but Carrey wasn't **** in 89, he was just a limb flailing rubber faced spazz.... He would not of have known what to do with the role, in any way.
Plus, so many hated the idea at the time of Keaton being Bats, that Nicholson being in the movie was probably what enticed (non batfan) people to see it.
Unless you mean Carrey playing some sort of revamped Joker role...which I dont see making sense either since Joker died in the 89 flick, but then I guess we'd get into the whole "the burton and schumacher films aren't sequels" debate, and that's just not necessary.
Either way... Nicholson did fine, I just wish he was thinner faced for the role, acting wise he was damn decent though. You can bet that if the first Batman movie had been made anywhere between 1994 and 2000, there would have been no question that carrey would play the role.
and Ledger definitely gives him a run for his money, I do prefer the Ledger rendition, but it's just different times and different eras really, I suppose.