They should get Jean Simmons to play Venom. Just to see what he'd do...
But I'm not one to listen to regarding those types of things, I once wanted to see Sylvester Stallone be Green Lantern.
Still, I think there's another Batman movie coming up, besides just the one with Ben Affleck and Superman. That one guy in Batman Begins when the prisoners start getting out? The bald mustachioed guy with scars on the back of his neck? Those scars look a lot like tally marks, and everyone who knows Batman down to a T knows what that means...