I just realized where George is gonna blow this movie. Instead of just having Obi Wan send Anakin into the firey depths of the lava, he'll do one of those "bad guy is hanging on for his life, good guy offers to help him up, bad guys lets go instead". Ya know, Anakin realizes everything he has done in that one moment, and can't turn back, so he decides to let go and end his life.
Lucas is going to steal that one moment, that one huge roar from the audiance when Obi Wan kicks Anakin's ass, and he'll throw us that cliche. You can just feel it.