If you look at all the comic book films that have come since then, in terms of tone, in terms of look, even in terms of Danny Elfman's music for Batman, so many that followed have been inspired by that, specifically. It had a cultural impact worldwide.

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 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.

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.

If you talk about genres - I don't care if you're talking about war, Westerns, science fiction, horror, fantasy, humor, romance - anything you can find, strolling the aisles of a Borders or a Barnes & Noble, I can bring you many comic books representing each genre.

To keep the readers interested, and coming back, and to keep coming up with new and exciting ways to present stories and to present the character in a reflection of the times, is an absolutely incredible accomplishment. Hats off to all these people who have done such incredible creative work and still do every week.

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.