Ben Affleck Admits Batman v Superman Title is Counter-Intuitive

The Batman v Superman: Dawn of Justice promotional train is full steam ahead, and stars Ben Affleck and Henry Cavill talked with ABC's Nightline about the film.

"Batman's the most interesting superhero because he's the most human, he's the most like us," Affleck said of his character. He admits, though, that the title takes some getting used to.

"It's counter-intuitive because they're both good guys, A, and B, how could Batman really fight Superman, because Superman's an alien and way stronger and invulnerable?" Affleck admitted.

"If you were to have a straight Batman versus Superman punch-up, we all know who'd win," Cavill said. He noted that the collateral damage of Man of Steel is very important to the film, something director Zack Snyder backed up, that there had to be "consequence."

Affleck's Batman is the oldest in film history, but Affleck still thinks it's "ballsy," and he's excited that his kids think it's cool. Affleck met Christian Bale, the last on-screen Batman, coincidentally at a costume shop... in the Batman section.

One of the biggest challenges? Working out to superhero shape.

"If I have to look as good as [Cavill], I'm in trouble. I worked out for a year to get into superhero shape at my advanced age," Affleck said.

Check out the full interviews above, including Affleck's kids' reaction to seeing "the real Wonder Woman" on set.

Batman v Superman: Dawn of Justice hits theaters March 25, 2016.