OK a few things:
(SPOILER)Two-Face is dead. Uhm, I'm quite sure Batman did not fall, he was holding on to the ledge. So people that are saying it makes no sense that he survived the same fall. I'd be severely disappointed if they brought him back, because it would defeat the entire ending of the movie, with Batman taking the blame for everything.

now here is a question my friends and I wondered about, and were commenting on during the movie... but never got answered.
(SPOILER)The boats... when we first saw the detonators, we assumed they blew up the opposite boat. But then we thought they probably blew up the boat they were on, because the Joker is twisted like that. You go to save yourself, but end up killing yourself instead. And if they blew up the other boat, then they'd live. If it blew up their own boat, they could both kill themselves. We figured that's the more likely scenario, but we never actually found out.

THE JACKEL