Trivia: When the film was announced, a lot of people thought that Michael Keaton was a poor choice for the role of Batman, because in the 1980s, he was only known for his comedic roles. Batman fans were so against the casting choice the 50,000 protest letters were sent to the Warner Brothers offices. Even Bob Kane, who created Batman, felt that Keaton was a bad choice.
Trivia: In order to make the bat boots, Nike air 3 trainers were used.
Trivia: Before the film was released, fans paid for a ticket at theaters just to see the trailer and leave.