Some people talk about "the stick of straw that broke the camel's back", meaning when something reached the tipping point. So when did the Batman franchise go bad? Well, "Batman Forever" was getting silly, but it still had Jim Carrey to steal the show as The Riddler ("Batman and Robin" had about as many good qualities as a barrel of toxic waste). Personally, I don't know why they had to have Batman (Val Kilmer) going through therapy; remove that and he still would have been a cool superhero with neat gadgets. Tommy Lee Jones wasn't bad as Two-Face. Nicole Kidman and Chris O'Donnell, as Dr. Chase Meridian and Robin, respectively, didn't really add anything.
Overall, the point is that when Joel Schumacher took over directing, the franchise went downhill. Part of the problem was that while Tim Burton created an eerie Gotham City that looked like New York in the 1940s, Joel Schumacher created a Gotham City that looked like it was trying too hard to be "Blade Runner".
So, the franchise starting getting stale with this one, but Jim Carrey kept the movie from being unwatchable. As Edward Nygma, one of Bruce Wayne's employees, he had some great lines. In the movie, Nygma proposes a device that rests atop TV sets and reads peoples' minds, but Wayne rejects it, considering it too dangerous. Thus, Nygma becomes The Riddler, and he's the best character in the movie.
