CLAYFACE
CLAYFACE CLAYFACE CLAYFACE CLAYFACE CLAYFACE
Not gonna happen, sadly.
Probably the
least likely to happen.
To me, the only one that seems like he's fit in the universe at this point would be Black Mask, who I'm rooting for. Bane, Killer Croc, and like wouldn't be able to be taken seriously. The Penguin is a bit too campy of a villain, and even if they somehow fit him in, it'd be hard to shake the feeling.
Plus, Nolan says that he wants to do villains that haven't been in any of the Batman movies yet. He also said no to Catwoman.
CLAY.
FACE.
But seriously, yeah. No one could make a movie about the awesome that is Clayface.