- What Could Have Been:
- Robin Williams was offered the role of Edward Nygma in Batman Forever before the casting of Jim Carrey, but turned it down due to his anger at Warner Bros. for being previously used as bait to lure Jack Nicholson into committing to play the Joker in Batman.
- During early production stages of The Dark Knight Rises, Warner Bros. expressed interest in using the Riddler as the main antagonist with Leonardo DiCaprio, Johnny Depp, Eddie Murphy, or David Tennant in mind for the role. However, Christopher Nolan was able to convince them to use Bane due to the character having a physical presence that the previous villains lacked.
- Jonah Hill was approached for Edward Nashton in The Batman before Paul Dano was cast. However, Hill turned down the offer due to disagreements over his pay and the studio preferring him to portray Oswald Cobblepot instead.
Trivia / The Riddler