Trivia: Billy Dee Williams only took the role of Harvey Dent because he knew Dent will become Two-Face, a character he very much wanted to play. When Joel Schumacher was hired to direct Batman Forever (Batman 3), Williams asked to play the part but it was given to Tommy Lee Jones instead.
Trivia: In his hideout, Joker has a lot of pictures scattered around the room. After he cuts out Vicki's picture and starts waltzing around the room, you can see the same picture that appears around the room of a smiling man with crazy dark hair. The guy in those photos looks a lot like Batman director Tim Burton.
Trivia: When Bruce Wayne is sitting in the BatCave there is a map of the Axis Chemical neighbourhood and a map of Gotham City. The first map is actually that of Capitol Hill, a neighbourhood in Burnaby, British Columbia (see Hastings Street on the south edge of the map, and Dollarton Hiway on the other side of the water). The other map is of Vancouver International Airport and part of South Vancouver, also in British Columbia.