Justice League is right around the corner and the rumor mill isn't just heating up, it's on fire! Fans of the DCEU have meticulously picked apart every frame of the trailers and every interview with the cast and crew for any hint of what's to come. This has led to people forming a lot of theories, some of which sound pretty crazy... until you listen to all the evidence. Justice League is going to be the biggest DC movie yet, and even people who have been bored by DC's attempts at a cinematic universe so far are getting excited about this movie. It is DC's best chance of reeling in audiences who are still on the fence.

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You can pretty much guarantee that at two hours and fifty minutes, it's going to be jam-packed with surprises and teasers for the future of the DCEU. Which new heroes are going to show up? What villains will be foreshadowed? What iconic storylines are going to be adapted for the big screen? How will Superman come back to life (because no one seriously believes he's dead for good)? We have questions. The fans have theories. Here are 15 Justice League fan theories that sound crazy, but might just be true!

Original Darkseid art in our feature image by artist Felipe Luiz.

15 GREEN LANTERN JOINS THE TEAM

Green Lantern is a name fans have been throwing out since DC announced its cinematic universe. After Justice League, he'll be the last major member of the team still not to show up anywhere in the DCEU. He was a member of the original team when they made their first appearance as the Justice League of America in The Brave and the Bold #28 by writer Gardner Fox and artist Mike Sekowsky.

The Green Lantern Corps movie isn't scheduled until 2020, but many fans think it would be a mistake to wait that long to introduce any Green Lanterns. Discussion heated up after the Comic-Con trailer for Justice League featured Alfred saying, "He said you'd come," to a figure off-screen. The easy bet would be Superman, but at this point, Bruce believes Clark to be dead, so he must be talking to someone else the audience isn't meant to see. Is it a Green Lantern? And if so, which one?

14 A GREEN LANTERN IS POSSESSED BY PARALLAX

Green Lantern's absence from the promotional material for Justice League is a bit suspicious, to say the least. The comic-con trailer for the movie features a monologue by the film's villain, Steppenwolf, where he says, "No lanterns," implying the Green Lantern Corps has been wiped out somehow. One fan theory suggests that Green Lantern could not be a part of the team this time around because he's currently possessed by Parallax.

It would explain why the Lanterns aren't present to help in the fight, despite the events of Justice League looking like a potentially universe-ending threat, and it could be a good backstory as to what happened to the Green Lantern Corps if they were wiped out by a member of their own team possessed by fear incarnate.

13 STEPPENWOLF WILL CONTROL SUPERMAN AS A VILLAIN

Let's be real here. No one is under the impression that Superman is going to stay dead in the DCEU. Not only would it be insane to kill off your biggest character in the second film of the universe, but the ending of Batman v. Superman: Dawn of Justice already hinted at his resurrection.

Some fans have suggested that the floating pebbles on Superman's coffin are actually due to a boom tube that Steppenwolf has used to steal Superman's body and resurrect him as a villain. Henry Cavill has already hinted that Superman will return with his iconic black suit and this theory would give some emotional weight to the story, with the team having to band together to fight what was once the world's greatest hero.

12 SUPERGIRL WILL BE INTRODUCED

There's been a lot of talk about what heroes are going to join the DCEU in the coming years, but one pretty big name was strangely absent from all the buzz until the Justice League Comic-Con trailer: Supergirl. Any longtime DC reader will tell you, she's not just the girl-version of Superman. Kara Zor-El is a rich and interesting character all her own that absolutely deserves her time in the spotlight in the DCEU.

This theory arose from a shot in the trailer of Bruce Wayne observing a hologram with a flowing red cape and a red-clad leg that is far too thin to be Superman's. You can just make out the same red cape in the shot where Alfred says, "He said you'd come," but Henry Cavill has already confirmed the black suit, so it's unlikely that the mystery character is Superman. Who has a similar costume? Supergirl.

11 BATMAN WILL MEET WITH LEX LUTHOR

Lex Luthor isn't expected to be a big part of Justice League, but Jesse Eisenberg is confirmed to be reprising his role for the film in some capacity. This shouldn't come as too big a surprise considering that Lex Luthor is the only character we've actually seen on screen with Steppenwolf so far, and he's kind of responsible for his involvement here on Earth.

As of the end of Batman v Superman: Dawn of Justice, Lex is still in prison, so this fan theory suggests that Batman will go to speak with him to obtain information about this malevolent being that he's responsible for unleashing on humanity. He'll likely give Batman a piece of information that will help the League defeat Steppenwolf or a warning of what's to come.

10 DARKSEID WILL BE INTRODUCED

It's already pretty obvious that Darkseid plays a big role in the future of the DCEU. His Omega symbol was stamped into the ground of the wasteland in the "Knightmare" sequence of Batman v Superman: Dawn of Justice, and it's already been confirmed that Steppenwolf, who is a servant of Darkseid in the comics, is going to be the Big Bad of Justice League.

Some fans are theorizing that Darkseid will be introduced in a manner similar to how Thanos was in The Avengers, with his lackey playing the villain throughout the film, only for his presence to be revealed in the final scene as the hand that moves the pawns into place. We can only hope they don't wait six years to actually have him do anything interesting. Looking at you, Marvel Studios.

9 IT WAS LEX LUTHOR'S PLAN TO UNITE THE JUSTICE LEAGUE

Jesse Eisenberg's portrayal of Lex Luthor received mixed reactions from audiences, but the extended cut of Batman v Superman: Dawn of Justice definitely showed that he was playing the role of a brilliant puppet-master, maneuvering all the pieces into place behind the scenes. The theatrical cut removed much of his machinations, making the events of the movie seem kind of random, but he planned every moment up to his eventual capture (and the whole "Martha" thing.)

At the end of the film, he was seen speaking with Steppenwolf, so he clearly knows more than he's letting on at this point. What if the capture was all part of his plan to bring the Justice League together for some kind of greater endgame to destroy all of Earth's metahumans at once?

8 CYBORG WILL BE CENTRAL TO STEPPENWOLF'S PLAN

Cyborg is the Justice League member we know least about in this movie. He's appeared less than any of the other members in the trailers and promotional material, and he's been the least talked about by the writers and directors. One fan theory suggests that this is all an intentional misdirect because he plays a key role in the film.

Steppenwolf will almost certainly be in search of the "Mother Boxes," extremely powerful sentient supercomputers that can control gravity, transfer energy, create force fields, rearrange the molecular structure of matter, control minds,  control and evolve non-sentient machines, and much more. The theory is that Cyborg's body is made of one of these Mother Boxes and that Steppenwolf will attempt to capture or kill Cyborg to get control of it.

7 SHAZAM MAKES AN APPEARANCE

That mystery character Alfred speaks to at the end of the Justice League trailer is one of the hottest topics of discussion among DCEU fans with theories ranging from Green Lantern to Supergirl to boring old Superman. Then again, maybe we're all thinking too hard about the mystery character when the answer is right in front of us on DC's production schedule.

After Justice League comes Aquaman in 2018, then Shazam in 2019. With Green Lantern Corps set for 2020 and no Supergirl movie on the schedule at all, wouldn't it make the most sense to introduce the next hero on the roster first, especially since he's a character general audiences won't be familiar with? This would also explain the patch of red we see on-screen when Alfred is talking, being the primary color of Shazam's costume.

6 COMBINE THE ARROWVERSE WITH THE DCEU

Crisis on Infinite Earths created a unified continuity within DC's hodgepodge of contradictory stories. It introduced the DC Multiverse, an infinite number of realities with an infinite number of versions of DC superheroes. The multiverse has already been established in the TV Arrowverse with The Flash, but what are the odds those characters will ever hit the big screen, especially with characters like Flash and Superman being recast for the films?

DC's chief creative officer Geoff Johns has gone on record saying that the TV and film universes coexist in the multiverse. Add to that, Bruce's "vision" of the Flash appearing to warn him of the future is a direct homage to a sequence in Crisis on Infinite Earths, and that red skies (which appear in the Justice League trailer AND are referenced on TV's The Flash) are a DC Comics trademark for their Crisis events.

5 THE FLASH WILL SET UP FLASHPOINT

First of all, Flashpoint is confirmed for the DCEU in some form or another because it's the title of the Flash's solo movie.  In the comics, the Flashpoint storyline involved Barry Allen going back in time and drastically altering the timeline, and eventually leading to DC's New 52 relaunch.

The DCEU Flashpoint theory suggests that we've already seen a consequence of Flashpoint in Batman v Superman: Dawn of Justice when the Flash comes through a portal to give Bruce a vague warning about how he was always right about Superman, and that Lois is the key. That would mean that Justice League will take place in a timeline already altered by the Flash, implying that the Flashpoint movie could involve Barry going back again to rectify the consequences of those changes.

4 HAWKMAN AND HAWKGIRL WILL SHOW UP

Hawkman and Hawkgirl are two more prominent Justice League members whose names have been mysteriously absent from all the buzz around the DCEU, but some hawk-eyed fans think we may have already gotten our first teaser for the legendary duo in the first trailer for Justice League.

In the trailer, there's a brief shot of the Amazons and Atlanteans going into battle against Darkseid's Parademons. If you look closely above the battlefield, you can see at least two flying figures with white flapping wings that some believe are the people of Thanagar, as in Hawkman and Hawkgirl. This could be a flashback to the people representing the forces of land, sea and air standing up against Darkseid and his minions in a possible invasion of Earth.

3 THE MOVIE WILL TAKE PLACE IN TWO ALTERNATE REALITIES

The DCEU is going to have to deal with the prospect of alternate realities eventually. It's the whole basis of the Flashpoint storyline and it's one of the trademark elements of the DC Comics universe, so it's guaranteed to become an essential part of the DCEU storytelling strategy.

We haven't seen much footage from Justice League so far, but we may have already seen the first hints of parallel universes in the trailers. The Comic-Con trailer intersperses clips of the Batmobile in a city-wide chase scene with the Parademons. The first shot shows a bluish-black sky, and a few moments later in the same chase, the sky is bright red. The red sky could be caused by some kind of alien device, or it could just be editing in different stages, but some fans are theorizing it's the same chase taking place in two separate universes.

2 AQUAMAN SAVED SUPERMAN IN MAN OF STEEL

There's a scene early on in Man of Steel where we see Clark protecting people on an oil rig before it explodes and he falls into the water. The scene cuts away to his childhood and when it cuts back to the ocean, we see two whales approach him in the water. The next we see, he's safely on shore. Obviously, Superman could probably get out safely without any help, but the two whales are an interesting addition to the scene.

An episode of Meet The Movie Press actually mentioned this theory back in 2014, but it was never confirmed in any official capacity. Since we're about to meet Aquaman for the first time, and he'll presumably meet Superman at some point during the movie, we might finally get some confirmation on this, even if it's just a throwaway line about Clark thanking his whales.

1 JUSTICE LEAGUE IS IN THE INJUSTICE TIMELINE

It's been pretty obvious from the start that the DCEU was taking the DC Universe to a dark and gritty place. Even the normally light-hearted and friendly Superman is angry and brooding most of the time. This would fit with the Injustice timeline where Superman becomes a murderous dictator after the Joker tricks him into killing Lois Lane and their unborn child.

We already got hints of this when the Flash came back in time to tell Bruce he was right about Superman and that "Lois Lane is the key." Injustice also has Batman and Superman opposing each other, with each hero supporting one or the other. We've already seen the rivalry between the two in Batman v Superman: Dawn of Justice and it could be leading to the DCEU's version of Civil War.

Which of these theories do you find the most outlandish and the most intriguing? Let us know in the comments!