I read that they're testing an alternate ending in the screenings to see if the fanboys overreact.
Seems that WB isn't trusting their test audiences to adhere to their non-disclosure forms, so the word is that they screened a different ending on purpose because they knew the fanboys would instantly hit the net and begin talking about it.
whomod said: I generally don't like it when people decide to play by the rules against people who don't play by the rules. It tends to put you immediately at a disadvantage and IMO is a sign of true weakness. This is true both in politics and on the internet."