"Originally, at the end of that scene, once the Joker reveals his information, Christian dropped him and then, almost as an afterthought, he kicked him in the head
as he walked out of the room. We wound up removing that bit. It seemed a little too petulant for Batman in a way. And really, more than that, what it was is that I liked how Christian played it: When he drops the Joker, he has realized the futility of what heís done. You see it in his eyes. How do you fight someone who thrives on conflict? Itís a very loose end to be left with."
I'm glad we'll see Batman kicking people's head this time.