I'm fine with voice actors other than Hamill playing the Joker. I even like John DiMaggio's Joker better than Hamill's for the darker, more sinister versions of him. The thing I'm not stoked about is that it's still the Joker. It's been two games man, I get it.
The Arkham games have said everything that's ever needed to be said about the Joker. Can a man get some Hush? Some more Riddler in the spotlight? I'll even take a game where it's all about trying to stop Jason Todd from killing all the criminals.