I went over to Imdb and read part of the discussions on Heath as the Joker. Wow, was that ever a fandom reality check!
Relatively many posters seem *very* worried (or even convinced) that Heath won't manage to do the part justice. And since they are dedicated batman fans, the fact that Heath may not be able to play the "Clown Prince of Crime" causes them very much concern. Words used include "unworthy" and the like.
Several are saying that sure, he played a gay cowboy well enough, but that doesn't mean he can manage to pull off the (apparently much more demanding and important) "psychotic serial killing genius" role to their satisfaction. And it's very clear that it's the latter makes or breaks Heath's acting in their view. The Joker is serious business. Ennis was just some "gay" role that Heath took on to win awards, - and which didn't in any way, shape or form require the acting chops that the Joker requires.
This was an useful reminder of how every fandom ultimately is and works alike.... and that dedicated fans are *serious* about their obsession, no matter what that might be.
Not for me to say that one fandom is more or less rewarding than the other, of course. But still.... Heath "unworthy" to play a clownishly made-up killer in a comic film?
Aaaargh. I personally think the role is beneath him and not the other way around. (And yes, I know many here probably won't agree, and that's fine. But I can't help being disappointed about this role choice.)