well the movie was supposed to be extremely dark and violent and an R rated film. Frank Miller talked about it last year more blaming WB for not wanting to make an R Rated Batman. Here is Miller's quote:
"It was the first time I worked on a Batman project with somebody whose vision of Batman was darker than mine. My Batman was too nice for him. We would argue about it, and I’d say, “Batman wouldn’t do that, he wouldn’t torture anybody,” and so on. We hashed out a screenplay, and we were wonderfully compensated, but then Warner Bros. read it and said, “We don’t want to make this movie.” The executive wanted to do a Batman he could take his kids to. And this wasn’t that. It didn’t have the toys in it. The Batmobile was just a tricked-out car. And Batman turned his back on his fortune to live a street life so he could know what people were going through. He built his own Batcave in an abandoned part of the subway. And he created Batman out of whole cloth to fight crime and a corrupt police force."
I am all for a different take on it. Whether those details from BatWiki would have been in the final film, we don't know? And its more than 15 years ago, i am sure Aronofsky would have even more ideas about it.