There was a lot of problems with the old Batman series. You had it get formulaic with that whole 2 villains a film thing. You also had the bane of Superhero movies this movie series started which is the "Villain Killer Syndrome"; that's where you always end up killing the villain at the end of the movie, which is rather stupid (A, they were these epic forces in the comics and you just off them. B, logistically and if you think about it, they'd only have been villaining around for maybe a week in the movie's time, whereas they are again epic forces in the comics and have been antagonists for years, which is why they are so epic). And that gets formulaic. So I think it should break out of that box.
The problem with this film was also that the script was intended to be dumb and campy, and it was pretty much just a giant commercial for the tie in toys.