Earlier you mentioned that no sane person would want to work for Joker because he would be wild with payment.

However, in the Burton Bats, Joker offed henchmen like it was nothing. Yeah, that's a dude you wanna work for.

Also, killing Joker in the first movie is idiocy, because then Batman has successfully avenged his parents. The problem with that is this: Bats is ALWAYS avenging his parents with every criminal he collars. It's central to the character that the reason he does what he does is because of his parents' death. He's still trying to save them.

So, basically, they fucked up Bats and Joker.