Muezzin wrote:More seriously...
The prologue introduces the Joker, but holds off revealing which of the clowns he is until the end of the scene.
Batman's introduction in the film pulls a similar fakeout with the copycat Batmen, until the real Batman is revealed.
I like that parallel.
The dialogue of the prologue was the only thing that bothered me. I felt like Nolan wasn't really demonstrating his literary prowess with it, just more giving standard dialogue that the general audience could kind of follow along with. It seemed almost campy and straight forward. But I think it was a smart choice with all things considered, I don't think Nolan wanted to confuse the audience within the first five minutes.
I much preferred the dialogue of TDKR's prologue, you really had to "pedal faster" in order to keep up with what was happening.