According to many people, that IMAX shot of the guy holding the gun up. That picture, supposedly the Joker is the FRONT guy, the guy with the blue/white mask, the grey suit. But I don't know if that makes much sense, because...his hair is not green it is blond?
And plus, the guy with the gun up, is wearing a purply suit, kind of the same colour that we are expected to see.
And it is very much like the Joker to turn on his henchmen and shoot them?
So wouldn't it make sense if the background guy was Heath?
Even though many people have said it is the guy in the foreground...
--dk7