Crazy Quilt is a former painter who is blinded in an accident, but regains his sight with the help of a scientist. Wearing a high tech helmet with cameras wired directly into his brain, he sees better than before... a little too well. The intensity of the colors he sees drive him insane, and he puts on some kind of amazing technicolor dreamcoat costume and uses his helmet, which appears to shoot lasers and hypnotic multicolored beams of light to aid him in his villainy. Pretty lame, but I actually think that's a cool cover (Detective Comics #535, art by Gene Conlan, I think?).
Pros: There isn't much bright color in these Batman movies. So Crazy Quilt would be a change of pace. If that's even a good thing, I don't know.
Cons: Naming yourself after a quilt doesn't really strike fear in your enemies.
How I'd do it: At most, I might have Batman walk past a cell in Arkham where a lunatic is sewing together brightly colored patches of cloth and talking to himself.
Casting Guesses:John C. Reilly? I just don't think you can play Crazy Quilt if not for laughs.
Verdict: Ain't gonna happen. Relatively speaking, I don't hate my idea for a Crazy Quilt cameo, but I don't think he's well known enough to even include as a wink to the fans.
After The Scarecrow, Ra's Al Ghul, The Joker, and Two-Face, who should be Batman's next enemy in the Batman Begins/The Dark Knight series? Well, as of now we know that Tom Hardy will play Bane and Anne Hathaway will play Catwoman.
Check out the master list for all the villains covered. I've pretty much run out by now. Obviously, there are more Batman villains, but not any of significance that I know of. As of February 2009, no one is confirmed as a villain. Not the Johnny Depp Riddler, not Phillip Seymour Hoffman Penguin, nobody.