Re: The Official Rate/Review Thread for TDKR (TAG SPOILERS!!!) - Part 3
They just threw that in there, so there could be a cheap twist at the end. That's really the only explanation to it.
He [Batman] has this one rule, as the Joker says in The Dark Knight. But he does wind up breaking it. Does he break it in the third film?
: He breaks it in...
: ...the first two.
The History of Batman Killing in the Comics