So what if Batman Returns was a "superhero movie?" If you're gonna make a live-action "superhero" film and you might as well make it as realistic as possible. Because what's the point of doing a live-action film with theatrical actors if you're gonna do a lot of silly unrealistic skullz?
Uh... to make a fun summer blockbuster? Like every other super hero movie in the world? If they wanted it to be realistic, they might want to... not make a super hero movie to begin with. Why do you think live-action movies are supposed to be realistic and animated ones are supposed to be unrealistic? Who ever said that?

I hereby challenge Christian Bale to fisticuffs at dawn! Hoo hah!