Speaking to EW, Ben Affleck talks about the evolution of the Batman. Going from a angry vigilante to a something more heroic:
And the character is very different, too. “BvS departed a little bit from the traditional Batman,” says Affleck. “He started out with all this rage directed at Superman, because of his coworkers who had died in the fight Superman had with Zod.” For Affleck, most of the hero’s ensuing actions were defined by barely-repressed fury – in contrast to the Batman we meet in Justice League. “He was holding on to a lot of anger, in a little bit of an irrational way,” Affleck says. “Whereas this is a much more traditional Batman. He’s heroic. He does things in his own way, but he wants to save people, help people.”
Affleck frames the new attitude as a return to a more classical incarnation of the Caped Crusader. “This is more in keeping with the canon of how Batman’s usually been portrayed, and how he’s portrayed vis a vis the Justice League in the comics,” he explains. “This is more the Batman you would find if you opened up your average Batman comic book.
You can read the full story on the EW site.
Justice League hits theaters on November 17, 2017.