Man of Steel and The Dark Knight Movie Poster "I want you to remember, Clark. In all the years to come, in all your most private moments, I want you to remember my hand at your throat. I want you to remember the one man who beat you". 

Now these were Batman's words to Superman from Frank Miller's "The Dark Knight Returns", narrated by Harry Lennix at the Comic Con forum, revealing the newest addition to the "Man of Steel" sequel and sending goosebumps throughout the eager crowd. When the image imposing Superman's logo over the black bat slowly emerged on the screen, everyone lost their minds.

Superman / Batman Comic Book
Zack Snyder's Superman origin story was a smash in the box office, netting $285 million domestically and another $350 million overseas, according to Box Office Mojo. A sequel was destined before the first showing on opening weekend, but the inclusion of DC's most popular superhero is an epic addition to an already successful reboot.

But there's a twist. The two won't be fighting side-by-side as some hero duo — they'll fight each other as enemies. That means one of them must be the villain, or at the very least some type of "frenemy" (think Hulk and the Avengers). Only bits and pieces are known about the next Superman/Batman flick, but the collective fan base is wild with speculation.

It's Not 'The Dark Knight Returns'

Despite the quote from the comic and the new Batman logo resembling the one Bruce Wayne dons in TDKR, the sequel won't be based on the story by Frank Miller. Snyder said in an interview that the epic battle from the TDKR comic will "inform" the film but won't be directly adapted, IGN reports. Harvey Dent and the Joker have roles in TDKR, but Snyder did not mention whether or not they'll be characters in the film.

Man Of Steel 2 Featuring Batman
Cavill Will Play Superman, Batman Unknown

You didn't think they were going to recast Brandon Routh, did you? Of course, Henry Cavill will come back to play Clark Kent. Batman, on the other hand, is a different story. The Dark Knight Trilogy creator Chris Nolan will likely return as producer for the sequel. The Dark Knight movies are so popular they play repeatedly on channels through, but that doesn't necessarily mean Christian Bale will return as Batman. Depending on how much of TDKR's story makes it into the movie, Bruce Wayne is older (55) and retired before coming back to his role as Batman.

The ending of "The Dark Knight Rises" fits perfectly with the story of a retired Batman, but Bale still looks fairly young (even though he turns 40 in January). Still, the casting choice for the new Batman is a total mystery, so all we can do is speculate.

Batman Vs Superman in the Dark Knight Returns
Batman > Superman

Superman can win a fight, but Batman can plan a battle. In the DC universe, Superman called Batman "the most dangerous man alive." Why? Batman has no powers, he's a human being and physically inferior next to Superman or most other Justice League members. So why does Superman fear him?

Bruce Wayne is a genius.

In the JLA comics, he learns the weakness of every JLA member in case he needs to use it against them — including Superman. In TDKR, he uses a gaseous kryponite cloud to subdue Superman before beating him down. His brains truly outnumber Superman's brawn.

That's where the details end for the new "Man of Steel" sequel, slated for 2015, but the one detail we want most is already revealed — it's going to be awesome.