3. Clayface
Who He Is: One of the weirdest villains Batman has ever faced. We would attempt to describe him for you, except there's been so many different versions (9 of them, last we checked) that any attempt to explain anything about him would undoubtedly lead to numerous comments pointing out errors we made. Suffice it to say, he is generally a villain who can shape-shift, and in his natural state looks like that clay monstrosity above (however that happened to nine separate guys is beyond us).
Special Powers/Skills: See previous segment "Who He Is".
Who Should Play Him: Once again, CGI, plus whomever he's impersonating through the course of the film. As for the voice, use the guy who voices him in Arkham City, Rick D. Wasserman.