Trivia: Ivy's hair color changes slightly during the movie. In the beginning, it was pure red. During the movie they dyed the wig with orange to get different looks.
Trivia: Director Joel Schumacher, feeling he had let down fans somewhat due to the film being so light-hearted and campy, wanted to direct another entry in the franchise that would be darker and more along the lines of the first two Tim Burton films. He expressed interest in pursuing a film following the character Scarecrow, which would also feature a return of Jack Nicholson's Joker from the original film. (In a dream-like role as a representation of Batman's fear due to Scarecrow's fear-toxins.) Schumacher also expressed interest in pursing an adaptation of "Year One" or "The Dark Knight Returns", again so he could give the fans a darker film closer to the comics. Eventually, the series was instead rebooted.
Trivia: Director Joel Schumacher stated that the producers demanded the film be "more toyetic"- a term he had never even heard of. When asked what they meant, he was informed that it meant the film should be able to easily be merchandised and made into toys, games and other tie-in products for children. It has also widely been reported that toy companies were brought in early in production, and given final approval over the designs used in the film, based on what would make for the best and most potentially profitable toys for children, to the dismay of the cast and crew.
Trivia: Val Kilmer was considered to play the make the role of Batman again but had a falling out with director Joel Schumacher, who later described him as "rude and inappropriate." They didn't speak to each other for 2 weeks during filming of Batman Forever as their relationship soured so badly.