One of our big bonding issues is me and Tim Burton hate Robin. He's just the most worthless character in the world, especially with Tim's conception of Batman as the loner of loners, to have this gushing boy run around, it made us both kind of sick to our stomachs!
The character Harvey Dent/Two-Face was played by Billy Dee Williams in Batman (1989) and Tommy Lee Jones in Batman Forever. Williams appeared solely as "Harvey Dent", pre-Two-Face, but took the role with the expectation of returning to play the villain in a sequel and was "disappointed" when that ultimately didn't happen. Williams finally got to play Two-Face nearly thirty years later in The LEGO Batman Movie.
Screwed by the Merchandise: A famous case. Arguably, McDonald's Happy Meal toys were the downfall of this film series. Parents felt that the Darker and Edgier second film in the series was inappropriate for children's toys, so the action figures went unsold. McDonald's was a strong supporter of the first film, so Warner Bros. insisted on a change in dramatic tone. So creators were changed, Joel Schumacher replaced Tim Burton and the third film was Lighter and Softer with more colorful characters and vehicles which could be translated into more action figures. This worked, and toys sold. However, there's an argument that the tone shift contributed to the fourth film not doing as well as the previous entries. Many working on Batman Forever commented that it was the first time they learned of the term "toyetic", which meant toy-friendly design decisions, such as the batmobile having only a single seat because that was easier to replicate as a toy. Decades later, Joker almost didn't happen because Warner Bros. executives were concerned that the film was not "toyetic".
Shrug of God: In regards to why Alexander Knox's newspaper in Crisis on Infinite Earths states that the Joker was captured by Batman if he died in the first film, Marc Guggenheim and the crew imagined that Jack Napier either came back to life or was replaced by a Legacy Character in the intervening 30 years between Batman '89 and the crossover.
What Could Have Been: Reports and rumors abound of what the planned fifth film in the series (titled Batman Unchained by most sources, and alleged by some to act as a series Grand Finale) would've been like. Some of the wildest rumors even said that there were talks to have Jack Nicholson reprise his role as a Back from the Dead Joker.
Word of God: According to Sam Hamm, the co-writer of the first film and the writer of Batman '89, the Burton films take place on Earth-89 while the Schumacher films take place on Earth-97.
Philippe Peythieu voiced Alexander Knox in the first movie, the Penguin in Returns, and Dr. Burton in Forever.
Gilbert Lévy voiced Bob the Goon in the first movie, the bank guard played by Joe Grifasi in Forever, and the observatory scientist played by Michael Paul Chan in the fourth movie.
In the Canadian French dub:
Éric Gaudry voiced Batman in the first three movies before voicing the Gollum Gang Leader in the fourth movie.
Élise Bertrand has voiced one different character in each movie: Alicia Hunt in the first movie, Catwoman in Returns, Chase Meridian in Forever, and Poison Ivy in the fourth movie.
Vincent Davy voiced the Joker in the first movie, the fat clown who gets blown up by dynamite in Returns, and Two-Face in Forever.
Hubert Gagnon voiced Harvey Dent in the first movie and Max Shreck in Returns.
Ronald France voiced Vinnie Ricorso in the first movie and the Penguin in Returns.
Pierre Auger voiced the younger Jack Napier in the first movie and the Riddler in Forever.
Daniel Picard voiced Chip Schreck in Returns before voicing Batman himself in the fourth movie.
Gilbert Lachance voiced Josh (the guy whose nose is bitten off by the Penguin) in Returns and Robin in the fourth movie.
Carl Béchard voiced the Mayor of Gotham City in Returns and Dr. Jason Woodrue in the fourth movie.
that Jack Napier either came back to life or was replaced by a Legacy Character in the intervening 30 years between Batman '89 and the crossover.