There have been so many interpretations of both Batman and the Joker in the comic books themselves over the decades, from one extreme to the next, and in the media, from one extreme to the next.

In a sense, comic books are frozen movies. If you look at a comic book, you are generally seeing the storyboard for a film. The great advantage of comic books, over the years, has been that, if they are frozen movies, they are not limited by budget. They are only limited by imagination.

I really became a hardcore Batman fan when I was eight years old. What was clear to me, the reason I liked him better than Superman or Spider-Man or the Hulk or whoever, was the fact that he was human, and I could identify with him, and I really believed in that character strongly. In my heart of hearts, when I was eight years old, I believed that if I studied real hard, and worked out real hard, and if my dad bought me a cool car, I could be this guy.

I have great admiration and respect for the editors, writers, and artists of the comic books. They're turning out, I don't know, maybe 100 Batman stories a year, and the character turns 70 years old in May. It's incredible: for 70 years, on a weekly basis, every Wednesday, there is some Batman story coming out, if not a bunch of Batman stories coming out.

There's so much technology [in the Batman movies] that's unbelievable and seems unreal, so it's hard trying to get the audience to believe that it all exists. So we got Morgan Freeman to tell them that it's real. And that is why Christopher Nolan is a genius.

Part of battle has been getting Hollywood to recognize that comic books and superheroes are not synonymous. That's been a huge breakthrough, just in recent years really, and as a result of that recent breakthrough, we've had movies like 300, Road to Perdition, and A History of Violence, that very few people realize were based on comic books and graphic novels. It's very important to make that differentiation.

I think it's one thing if you are turning out dozens or even a hundred stories a year, you've got to have a great supporting cast behind you. Superman had a family that developed, and it's only natural that Batman has a family of sorts that developed. I think it's a great way to keep the comics interesting and varied, to appeal to different segments of an audience, to bring new perspectives to it.