Warning: Spoilers ahead for "Game of Thrones," including predictions and speculation of future events.

George R.R. Martin's epic fantasy series "A Song of Ice and Fire" isn't just the source material for HBO's television adaptation "Game of Thrones," it's the basis for literally hundreds (if not thousands) of fan theories. Discussion hubs like /r/asoiaf and Westeros.org are home to some of the most popular predictions for the future of the series.

With two seasons of the show to go, we've rounded up some of the theories that could still come true on "Game of Thrones." 

Take a look and make your own decisions about the ones you think will most likely go down on the upcoming seasons.

SEE ALSO: HBO finally dropped the first full 'Game of Thrones' season 7 trailer — and it's incredible

SEE ALSO: The final 'Game of Thrones' season will only have 6 episodes

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Daenerys is actually the villain, and will wreak havoc in Westeros.

Though Daenerys is a strong leader who generally appears to be a champion for the common people, there is a running theory that she isn't the hero people think.

As INSIDER's deputy editor Megan Willett explained, both the show and the books have provided evidence that she could be headed down a darker path. There have been many analyses throughout the years that support this idea as well.

The idea boils down to this: Daenerys is going to arrive in Westeros and be seen as a vicious conqueror — not the savior she thinks she is. Daenerys is beginning to see the benefit of full-blown war and violence over politics. And besides, there's another character who is being set up as the true hero of Westeros— Jon Snow.

Jon Snow may broker a peace with the White Walkers to restore peace to the realm.

One of the top posts of all time on the "A Song of Ice and Fire" subreddit is a theory about the "true nature and purpose of the [White Walkers]." The thought starts with Martin's open affinity for grey-area characters. He doesn't believe in pure evil or pure good. That begs the question: How are the White Walkers anything BUT pure evil?

Redditor c_forrester_thorne guessed that perhaps the White Walkers forged an ancient pact with men long ago, and helped build the Wall as part of their agreement. But now Daenerys and her dragons are a part of breaking that pact — hence their attack on Westeros. Here's part of the theory summary:

[The White Walkers] are hostile towards men because of [...] their incursion into the Other's agreed on territory, and the danger the Targs and their fire magic pose to the Others and the world at large. Rhaegar fathered a son by Lyanna to unite the blood of the dragonriders and the Other-kin, whether he knew it or not. Jon is that son and will bring peace between the Others and the realms of men.

Bran will warg into a dragon to help fight the White Walkers.

Over the course of six seasons, we've seen Bran acquire more powers than he ever could have imagined. Not only is he a powerful greenseer capable of traveling throughout time and influencing events, but he can warg/skinchange into animals and humans alike. Warging, the act of transferring your consciousness into another being, is a relatively unexplored aspect of "Game of Thrones."

Three years ago, Redditor svenhoek86 asked the /r/asoiaf community if warging into dragons was a possibility. There is a line from Bran that might be important foreshadowing. In both the show and the books, Bloodraven tells Bran that he'll never walk again, but he "will fly."

Daenerys has three dragons, and in the books there is a prophetic statement in a vision which states "the dragon must have three heads"— interpreted by book readers to mean there must be three dragon riders. Daenerys is one, and some believe either Jon Snow or Tyrion could be the second, leaving Bran the third dragon to "ride."

Warning: Spoilers ahead for "Game of Thrones," including speculation of future events.

The "Game of Thrones" season six finale helped confirm the series' biggest fan theories of all time — "R + L = J." We know now that Jon Snow is the son of Rhaegar Targaryen and Lyanna Stark. 

Rhaegar Targaryen was the son of the Mad King Aerys and older brother to Daenerys. Though Rhaegar has never been seen on the show, viewers did finally get a look at Lyanna on the sixth season finale. She was Ned Stark's younger sister, betrothed to Robert Baratheon before running away with Rhaegar and bearing his secret lovechild, Jon Snow.

On the finale, Lyanna Stark was shown handing off a baby to Ned, begging him to protect it from the wrath of Robert Baratheon. After the finale aired, HBO confirmed that Jon was the son of Rhaegar and Lyanna. But for now, let's look at specific instances from the show that were foreshadowing the theory as well.

Scroll down for the biggest moments from "Game of Thrones" that proved "R + L = J" is true.

SEE ALSO: 13 'Game of Thrones' actors whose real-life accents sound nothing like their characters on the show

Ned Stark purposefully didn't call Jon his son, but instead said "my blood."

Ned kept Jon's true parentage a secret his entire life, choosing to raise Jon as his own for the boy's own protection. But Ned is an honorable and moral man. He avoided lying outright when he could help it. So when Jon asked Ned about his mother on season one, Ned replied carefully: "You are a Stark. You might not have my name, but you have my blood."

The Stark family blood does indeed run through Jon. It just happens to be Lyanna's blood, not Ned's.

Daenerys had a vision of "Snow" in the Throne Room.

When Daenerys enters the House of Undying in Qarth, she experiences a series of prophetic visions. One of these was when she saw snow in the Throne Room of King's Landing. Immediately afterwards, she walked through a door and found herself at the Wall. This was heavy foreshadowing of Jon Snow's true family history and ties to the royal Targaryen family. 

Oberyn Martell explicitly says that Rhaegar and Lyanna had an affair.

Before running off with Lyanna, Rhaegar Targaryen was married with Elia Martell — the sister of Oberyn Martell. The running story in Westeros was that Rhaegar kidnapped and raped Lyanna, but Oberyn seems to know about a different version of events. 

"The last time I was in the capital was many years ago," Oberyn told Tyrion. "Another wedding: my sister Elia and Rhaegar Targaryen, the last dragon. My sister loved him. She bore his children … and beautiful, noble Rhaegar Targaryen left her for another woman."

This was the first time on the series that viewers were told anything other than the kidnap and rape narrative. A significant moment for theorists watching.

Warning: Spoilers ahead for "Westworld" season two.

Who did Ford have Bernard print onto a control unit? What is the "weapon" William showed Dolores? Who was Dolores speaking to in the second season's opening scene?

From the best posts on the "Westworld" subreddit community to popular YouTube videos, we're here to bring you all the biggest fan theories about what's in store on the second season of HBO's hit series.

Keep reading for a look at nine major "Westworld" fan theories you should know.

The Bernard we saw wake up on the beach is being manipulated by the Delos team in a looped narrative.

There's something off with Bernard in the "two week later" time frame we're seeing this season. He's disoriented, but was able to finish Karl Strand's sentence and saw different versions of the hosts being executed on the beach. 

Many on the /r/westworld community, as well as YouTuber HaxDogma, have speculated that the Delos team knows Bernard is a host and they're putting him through a looped narrative in order to make him reveal what happened. 

Now that we know "The Cradle" is a simulation technology, it's possible the version of Bernard we saw wake up on the beach is really just undergoing a simulation so the Delos team can extract information from him.

The secret Delos experiment is making human-host clones of important guests who have visited the park.

As Bernard witnessed in the secret lab Charlotte brought him to on the first episode this season, Delos has been logging video footage of guests' experiences along with their DNA. Then we saw a second hidden lab on the fourth episode, where the host-human hybrid of James Delos was being kept. 

The Host-James was a failed experiment, but what if Charlotte and Delos were able to crack the coding? Are they trying to create more host-human hybrids of other important people? Or are the guest logs being used to blackmail powerful people in society who visit the park and indulge? 

Dolores made a new Arnold host, and that's who she was talking to during the very first scene of this season.

The very first scene of this season is a big mystery. It's shown in a different aspect ratio than the rest of the episode, and at first it appears to be a flashback of Arnold talking to Dolores.

But if you rewatch the scene, it can be interpreted as current, fully conscious Dolores waking up a host-version of Arnold and questioning him. 

The clothes and mannerisms match with what we've seen of Arnold in the past, but so far it's a a toss-up for who the person is sitting across from Dolores. 

• "Game of Thrones" actor Hapthór Björnsson (The Mountain) has fans hyped.
• In an Instagram Q&A, Björnsson said his favorite scene is happening on season eight.
• For many hoping the fan theory "Cleganebowl" comes true, this could be a good sign. 
• Cleganebowl posits that the Clegane brothers — The Hound and The Mountain — will fight to the death.

"Game of Thrones" fans are well-aware the series only has six episodes left, which means there are only six episodes to show everything fans have wanted for so long that hasn't been shown yet. Near the top of this list is Cleganebowl, aka the big battle between Sandor "The Hound," Clegane and his brother Gregor "The Mountain," Clegane. So, will the two forces collide in Season 8?

The latest news certainly has us wondering, as actor Hafthór Björnsson may have revealed a bit too much when asked about his favorite "Game of Thrones" scene during an Instagram Q&A: "It happens in season 8 ... so I can't speak about it."

Hafthór Björnsson didn't give much away, although by revealing his character has a significant Season 8 scene in "Game of Thrones" he may have said all fans needed to hear. Gregor and Sandor met briefly in Season 7, and though the two brothers had gone through a lot in between the last times they saw each other, their hatred for one another ran as deep as ever.

With Cersei set to double cross Jon and Daenerys when the White Walkers attack, the stage is certainly set for Sandor and Gregor to do battle, and if that does happen, the scene would be Björnsson's favorite scene he's shot thus far.

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• The first full trailer for "Frozen 2" arrived, and with it a new sighting of mysterious symbols which might be a key part of the coming story.
• The four symbols appeared in the teaser trailer earlier this year, as well as in the official poster.
• In the new trailer, we can see them on a ceremonial-looking rock formation.
• Fans believe each of the symbols represents a season, which means there could be people out there with fall, summer, and spring powers. 
• Others think they're the four elements, and that "Frozen 2" will connect Anna and Elsa with Norse mythology. 
• Visit INSIDER's homepage for more stories

Disney released to first full trailer for "Frozen 2," and among the new magical elements and exciting landscapes was a familiar set of symbols.

When we see Anna, Elsa, and their companions walk through a mysterious bank of mist, the four ceremonial-looking rocks on either side of them are carved with geometric patterns.

Those are the same four patterns which appeared in the first teaser trailer as well as in the official poster released by Disney earlier this year.

See more: Watch the first full trailer for 'Frozen 2' here

People first picked up on the larger importance of these symbols after actor Josh Gad (who voices Olaf in both "Frozen" films) tweeted cryptically about the poster.

"If you look hard enough, this teaser poster will reveal quite a few surprises," Gad wrote. He then added in parentheses, "like how pretty a snowflake is up close."

Here's a closer look at the poster, where you can see the four symbols most clearly in the large parallelogram shapes.

We also saw them in the teaser trailer in the below shot, which happens when Anna looks out over Arendelle and sees the parallelogram-shaped crystals in the sky,

So what do they mean? So far neither of the trailers have mentioned these shapes directly, but that hasn't stopped people from theorizing. 

Read more:Fans think they've already figured out the new plot of 'Frozen 2.' Here are the best theories so far.

As noted by INSIDER back in February, it's possible the four symbols represent each of the seasons: Winter, spring, summer, and autumn. 

We know Elsa has winter-powers, all related to ice and snow. Perhaps there are three other people out in the world with powers connected to the other four seasons, and part of her mission in "Frozen 2" will be seeking out these other folks.

But others think the four symbols represent the elements: Earth, air, fire, and water. 

Perhaps the other powers in the world aren't connected to seasons, but instead to the four elements. The elements are also a key part of many different ancient mythologies, so it's possible the new magic and creatures we'll meet in "Frozen 2" are related to ancient Norse myths since Arendelle is a Norwegian-inspired kingdom.

In the new trailer, one of the trolls tells Elsa and Anna they must "go north, across the enchanted lands and into the unknown." There's not a ton directly north from Norway, aside from icy ocean, Greenland, and the Norwegian island of Svalbard. 

Elsa seems to be struggling to magic her way off a stretch of land and across the ocean in the new trailer. Is she trying to escape from an island? And what was with the magical ice-horse she sees under water? 

Maybe the group will leave their country entirely and set off across the ocean to find this new "unknown" place the troll spoke of. Or perhaps he just meant she needed to go deeper into the northern parts of their own land. 

Either way, those four symbols seen on the rock formation (which itself is very reminscent of an ancient, ceremonial place like Stonehenge) will most certainly come into play during the events of "Frozen 2." They're only unveiled in the trailer when Elsa uses her powers to clear the misty clouds and reveal the way forward. 

We'll have to wait until November 22, or for more clues from Disney, to know for certain. In the meantime, you can watch the trailer for "Frozen 2" here. 

• Read more:
• The best theories about the plot of 'Frozen 2' so far
• 10 things you didn't know about Disney's 'Frozen'
• 'Frozen' director has a theory that the princesses are related to a character in an entirely different Disney movie
• 6 questions we have after watching the first 'Frozen 2' teaser trailer

Join the conversation about this story »

NOW WATCH: Nxivm leader Keith Raniere has been convicted. Here's what happened inside his sex-slave ring that recruited actresses and two billionaire heiresses.

• After the trailer for Emilia Clarke and Henry Golding's upcoming romantic comedy, "Last Christmas," was released, people started sharing what they think the movie's plot twist will be on Twitter.
• Some people think Golding's character might be a ghost or an angel.
• Relatedly, people think it's possible that Golding's character was an organ donor and Clarke's character got his heart in a transplant.
• That theory is also a nod to the song "Last Christmas" by the '80s band Wham! with George Michael that is featured in the trailer with lyrics that say, "Last Christmas I gave you my heart."
• Visit INSIDER's homepage for more stories.

People are excited about Emilia Clarke and Henry Golding's upcoming romantic comedy, "Last Christmas"— so much so that they're taking to Twitter and sharing theories about what they think might be the movie's plot twist.

The trailer for the Emma Thompson-written film dropped on Wednesday and follows the story of Kate (Clarke), a woman who works at a Christmas shop and meets a man named Tom (Golding) after a chance encounter. The pair keep meeting and eventually fall for one another. The trailer also reveals that Kate "used to be really sick" and "nearly died."

But many people don't believe the plot could really be that simple. On Twitter, people are already abuzz with theories on what the twist ending of the holiday romantic comedy might be.

One of the most common theories is that Tom might be a ghost or an angel sent there to help Kate turn her life around.

Expanding on this theory, people are arguing that Tom could have been an organ donor for Kate, who says in the trailer that she was very sick. The theory goes further to suggest Kate was given Tom's heart and he is now a ghost or an angel visiting the woman whose life he helped save thanks to the transplant.

Further assisting this line of reasoning is the classic song "Last Christmas" from the '80s band Wham! with George Michael which is featured in the trailer. The song's famous lyrics go: "Last Christmas I gave you my heart."

But some users are hoping that Tom is just a great guy who helps Kate become a better person and the two fall in love and live happily ever after — all in the spirit of a cheerful holiday rom-com.

"Last Christmas" will hit theaters on November 8. You can watch the trailer again here.

Join the conversation about this story »

NOW WATCH: Nxivm leader Keith Raniere has been convicted. Here's what happened inside his sex-slave ring that recruited actresses and two billionaire heiresses.

• Shortly after season two of Netflix's "You" was released, the streaming network renewed it for a third season. 
• Warning: Major spoilers for Netflix's "You" ahead.
• Some fan theories suggest that Joe is not the father of Love's baby. 
• Other viewers speculate that Ellie will return to take down Joe — and she'll use Forty's film adaptation of Beck's book to do it. 
• Visit Insider's homepage for more stories.

Not long after season two of Netflix's "You" was released, the thriller was renewed for a third season. 

While waiting for the next installment of episodes to drop, viewers are left with many questions and speculations about the future of Joe (Penn Badgley) and Love (Victoria Pedretti). 

Here are some popular fan theories that could come true on season three of "You."

Warning: Major spoilers for Netflix's "You" ahead.

Milo is the father of Love's baby.

Some fans think it's possible that Milo (Andrew Creer), the friend of Love's ex-husband who she dated briefly after realizing Joe had lied about his identity, is actually the father of Love's baby. 

This is a plausible theory because it isn't made clear that Love and Joe had sex together during or after her relationship with Milo, and there was no indication that she was pregnant before she broke up with Joe. 

At one point, Love tells Joe that she knows the baby isn't Milo's because she made him use protection, but there's a chance she lied about that to save herself. After all, Joe was going to kill her just before she revealed she was pregnant. 

Also, most forms of contraception aren't foolproof— Love might believe the baby is Joe's only to later realize it's Milo's. 

Neither Milo nor Joe is the father of Love's baby.

Another fan pointed out that it's possible neither Milo nor Joe are the baby's father.

Perhaps Love could have pursued having a baby using artificial insemination. 

Throughout season two, Love showed a deep desire to have a child, telling Joe that having a baby would create for her a type of family that she never experienced before.

Given the Quinn family's resources, it's possible that she chose to pursue her dream of motherhood on her own during her brief period between being with Milo and getting back together with Joe.

It may seem far-fetched, but "You" is a show known for it's shocking and terrifying moments, so we can't rule anything out completely. 

Love actually poisoned and killed her late husband.

Many fans think it's possible that Love murdered her late husband James (Daniel Durant) because he didn't want to have a baby. More specifically, since she is a chef, some believe that she slowly poisoned him over time with baked goods.

During season two, it's revealed that Love was once married to a man named James, who died of a mysterious illness. James also happened to die shortly after the couple had a major fight about whether or not to have a baby. 

At one point, Love vaguely tells Joe that doctors couldn't figure out what was wrong with James and he passed away as a result.

Also, during season two, she baked Joe a pastry that was sneakily loaded with salt — not quite poison, but it shows she's not afraid to mess with someone's food. 

The real Will Bettelheim will come back for revenge.

Some fans believe that the real Will Bettelheim (Robin Lord Taylor), who Joe captured and locked in the glass box, will return on season three to get revenge. 

It's certainly possible considering how odd it was was that Will not only maintained contact with Joe after being released, but also cultivated a friendship with Joe and agreed never to turn him in to the police.

During the finale of season two, we are also shown a postcard from Will to Joe that says, "Haven't heard from you for a while. Everything OK?"

It seems that Will is trying to keep in touch with Joe and is concerned about being cut off. Perhaps it could be because he's hoping to seek revenge in the future. 

Joe will try to kill Love's mother, who was seen at the end of season two.

After seeing Love's mom Dottie Quinn (Saffron Burrows) at Love and Joe's new house on the season-two finale, some fans believe that she could be one of Joe's next victims. 

It's unclear whether Love's mother is living with the couple in their new home or if she's just there to help with the move, but it is possible that (having seemingly mended her relationship with her daughter) she will appear more often throughout season three.

If Joe finds her presence threatening for any reason, it's possible he could murder her. After all, he already watched fellow Quinn family member Forty (James Scully) die — and we all know Joe's not afraid to get blood on his hands. 

The pee jar from season one will finally be found and it will implicate Joe in Peach's death.

A number of fans believe that, during season three, the jar of pee that Joe left at the Salinger estate will finally be found, helping to implicate Joe in the death of Peach (Shay Mitchell). 

This theory is possible because Joe mentions the pee jar a couple of times throughout season two, suggesting that he believes the evidence to be a threat.

Notably, according to Healthline, it's difficult to extract DNA from urine and it's hard to reliably test DNA that's found in urine. But the jar could still play a major role in incriminating Joe, especially if someone starts to look closer at Beck's book, just like Forty did. 

And as some fans speculate, the private investigator that the Salinger family hired to look into Peach's death could be the person to put all of these pieces together. 

Dr. Nicky will finally reveal what he knows.

After the season-two finale, fans were left wondering why Dr. Nicky (John Stamos) refused to help Forty put Joe in jail.

And so, some believe that during season three Dr. Nicky will find out that Forty has been killed and it will inspire him to finally reveal the information that Forty gave him in order to put an end to Joe's killing streak. 

As Redditor meowieu pointed out, Dr. Nicky recorded all of his therapy sessions with Beck (Elizabeth Lail) and Joe during season one. It's possible that pairing these recordings with the information from Beck's book could implicate Joe in Beck's death. 

Forty's movie about Beck's book will be released posthumously — and Ellie will be the one making it happen.

Some fans think that Forty's movie adaptation of Beck's book "The Dark Face of Love" will be completed and released by Ellie (Jenna Ortega) during season three.

This makes sense since Ellie had been working with Forty to write the script for the adaption of the book. She's also interested in filmmaking and has been receiving money from Joe. 

Making the film could also help Ellie realize the truth about Joe. After all, if Forty put together the pieces that it was Beck's ex-boyfriend who likely killed her, Ellie might be able to do the same. 

Read More:

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