I love how people talk about the Nolan films as if they were made by Lars Von Trier or Roman Polanski or something (full disclosure: haven't seen Rises yet, doing that tomorrow). Nolan is not completely without a sense of fun or joy, people; there's loads of dry humor in his movies, even if the "blockbuster" one-liners fall a little flat now and then. His "realism" extends to the facts that he treats Gotham like a real city, the characters as if they were real people, Batman's tech like it could conceivably exist in the real world, and Joker never fell into a pit of acid/doesn't use a special gas to make people laugh themselves to death. You're just not going to see a man who can only survive in sub-zero temperatures, a man who turns into a bat-creature or a shape-shifting former actor in his films.
That being said, I think Edgar Wright (who's been suggested already) could kick major ass with a more heightened, animated series-esque take in live action. The character designs for the Arkham games could be a good starting point.