As i have already said batman killing the Joker is withing his character because Bob Kane allowed that on the 1989 film.
Christopher Nolan did not create Batman, Bob Kane did.
I think his the true author of batman can say what and what is not batman too bad he is dead.
The only film the author approved was the first batman film starring Michael Keaton and directed by Tim Burton.
As i have already mentioned the new batman films fit more in the Frank Miller batman universe than they do Kane's.
Anything not worked on by Bob Kane is EU. In the Same way all star wars stories not by Lucas are.
Same with the Bond Films and Star Trek. They can add the created by and trademark all they want it does not validate it as the original authors intent or an extention of their work.
as i posted earlier and nobody responded to:
quote "I don't think I've read a single "Batman" comic where Batman *didn't* save the Joker when he was about to die. That's completely in character for Batman - it was Burton's version that was out of character for him.'
I don't have a problem with those changes. Because they were approved by batmans real author bob kane, and added a dramatic backbone the story needed.
Even if it became silly in execution.
The only batman that is truly canon is that written By Bob Kane. all the rest are like EU.
That is fact, no matter how much i like batman year one that is Frank Miller's take on a character that has gone through hundreds of changes and permutations since the forties, there is no real "definitive" composite batman.