Indiewire has an irritating obsession with Fassbender. There's no solid proof that Simon was "a role pegged for him" and not for James, only that MF maybe had a role in the film (I think the right option would've been Cassel's role).
Anyway, nice interview. At first I have to admit I didn't care much for Arthur, but the reviews have been so good that I'm getting more and more curious. Hopefully some cinemas here will show the original version.