2. Alan Tudyk
Alan Tudyk is known for his roles as a slick talking, witty goof ball . He cracked that mold a little bit with his portrayal as the extremely racist baseball coach Ben Chapman in the movie 42 with dialogue that left audiences feeling uneasy. Tudyk is probably best known as Wash from the cult classic show Firefly that saw its fire go out on FOX back in 2003. Tudyk is another actor with incredible range that could easily switch in and out between the riddle obsessed madman to a cool and calculated genius. It could be a real treat to see Tudyk play the Riddler's alter ego Edward Nigma when not out causing havoc on the streets of Gotham. As an audeience, it should be important to see the villains as their "human" selves and this is especially true for the Riddler.