Nolan Talks About Batman 3, Catwoman, The Riddler and The Penguin

[Magus]

Clayface could fit into the Nolanverse as long as they went with the Arkham Asylum version, which is where Clayface's power is to suffer from a horribly painful and disgusting skin condition similar to leprosy. So no, you're right, he won't be in a Nolan movie.

Rutger Hauer's character fits the backstory but it would be kind of farfetched to expect someone that old to be a match for Batman, even with guns.