Re: So let's talk about Mask of the Phantasm...
I have to say that one of the few missed opportunities of Batman: Mask of the Phantasm was the lack of a follow-up. The revelations and character growth nor any of the events of the movie were ever referred to in Batman: The Animated Series. As a result, it comes off as less the DCAU equivalent of Batman Begins, but an out-of-continuity tale. It's not so much a problem with the film in and of itself, but the film as a part of a larger continuity. Does that make sense?
Fan of Christopher Nolan's Batman!