3. Frank Sinatra Wanted to Play The Joker on the TV Show — Things You Didn’t Know About Batman

The world of Batman officially became a cultural touchstone when it leapt off the page and became a massive television hit in the 1960s. Not only did Batman (Adam West) and Robin (Burt Ward) become overnight celebrities, but the villains who got in on the act are also remembered and revered for their work on the campy superhero show. Singer Frank Sinatra reportedly wanted to be Batman's main foe but the role had already gone to Cesar Romero, a rumor that was confirmed by Ward years later in an interview. “From what I understand," Ward said, "Frank Sinatra was very upset because he couldn't play The Joker.”