Aren't you like 14? You're gonna have a hell of a time getting in.
Anyway, I've seen it and loved it. Unfortunately I'm afraid many people will have a hard time looking past the fact that it's a fourth part and find reasons to hate it.
Also about that spoiler, there are a LOT of hypocrisy instances... what about saying that one of them has to kill the other? And what about Amanda's test? Surely Zep is the least of the hypocrisy.
EDIT: Oh and Chris, this is not the last one. I'm not gonna spoil the ending, but all I can say is it's made pretty apparent. Plus, they've stated that they already started working on 5 AND 6, and waiting to release them both back-to-back in 2009 instead of following the one-year tradition. This is not certain about the release, but they have definitely already started.