In relation to Dennis's last post:
I used to think the two actors who would never go comic-book movie were Sean Penn and Robert Redford.
Penn did do an action drama eventually but it wasn't your Nicolas Cage-style escapist flick.
I don’t know how true they were but there were rumours after Batman Begins that Penn was on Chris Nolan’s shortlist to play Joker for its sequel.
I used to think he might have made a good Wolverine.