Director Zack Snyder has pledged to "explode" the respective Batman and Superman universes in the upcoming superhero crossover movie.
He added that the film - which follows Man of Steel and stars Henry Cavill, Ben Affleck, Jesse Eisenberg and Gal Gadot - will not be a slave to the characters' source material.
"[The movie] literally takes the Man of Steel and Batman universes and explodes them. You're not as tied to the mythology," he told the Los Angeles Times.
"In Man of Steel, we had to create an origin story, a mythology, and there's a lot of energy into that, which we love doing. Don't get me wrong. But when you think about how fun it is too - now that you've got these characters - to now let 'em loose. That's fun!"
Snyder also spoke about Jesse Eisenberg's casting as Lex Luthor, explaining that The Social Network star's portrayal of Superman's nemesis will reflect their approach in writers David Goyer and Chris Terrio's storyline.
"We know the material. Unfortunately, the fans don't know the material. So, we're casting according to what's happening in the script," he said.
"And we're hoping that leads to enough originality, enough perspective on what we're doing that you get something fresh and exciting. I understand the canon. I'm not crazy. I know what these characters need from a mythological standpoint.
"I think Jesse is going to be an amazing Lex. Let's not forget he was nominated for an Academy Award. It's not like I just grabbed my friend to play the guy! This guy's the real deal."
Batman vs Superman is expected to to be released in May 2016.