I'm not even a fan of the comic book and I went, "Huhhwuttt?" when I learned that RDJ was cast as Tony Stark. He didn't seem like the actor who would even *fit* in a superhero movie, so I had some reservations when I first watched it.

I can't wait for Dark Knight. XD It'd be like the battle between two playboy billionaires, though I'm all for singing Kumbaya and I want the two of them to team up for major pwnage. :D