I'll make this short & sweet: go see The Dark Knight.
This isn't your campy, 1960's Batman. This is dark, gritty, violent, and challenging. Bruce Wayne's choices are awful, and the Joker as portrayed by Heath Ledger is chaotic evil incarnate. I always felt that Jack Nicholson did an OK job as the joker, but not fantastic. This Joker is really disturbing. Really.
This is far and away the best comic book film adaptation I have ever seen. It's true to what Batman was supposed to be, and yet it's updated and very real. Very in the present. It's disturbingly possible.
Go. Watch the movie. I'll bet it haunts you the way it's haunting me.
