Ok, I've been watching a lot of "Doctor Who" lately and saw "The Dark Knight" a few times, and it seemed like The Doctor probably wouldn't put up with Batman for too long, and the Joker even less.
Batman: Mask of the Phantasm opens with the city's most feared gangsters being systematically eliminated, and assumed blame falling on the Caped Crusader. But prowling the Gotham night is a shadowy new villain, the Phantasm...