Originally posted by mitchum
I'm just saying throughout the whole movie the Joker plays this sort of mastermind, having a plan behind everything, then at the end he lets lose and has no backup plan and everything's set.. the Batman wins ect. I don't see it that way.
He DID have a masterful plan.
He didn't think they'd figure it out. He also didn't think that the people on the boats wouldn't destroy each other because he had a fundemnetal flaw on his understanding of the altruism in humanity. That's why he failed.