does this movie have a sequel that was cancelled?
Yes, it was titled "Batman Unchained".
Batman &amp; Robin (film)
 However, writer Akiva Goldsman turned down an offer to write the script. In late 1996, Warner Bros. and Schumacher hired Mark Protosevich to write the script for a fifth "Batman" film. A projected mid-1999 release date was announced. "Los Angeles Times" described their film as "continuing in the same vein with multiple villains and more silliness". Titled "Batman Unchained"
how many batman movies did george clooney make None, but he has acted in "Batman & Robin". when was this movie released? 1997 who is the fictional character in it? Richard John Grayson
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Batman &amp; Robin (film) [SEP] Cancelled sequel
During the filming of "Batman & Robin", Warner Bros. was impressed with the dailies, prompting them to immediately hire Joel Schumacher to return as director for a fifth film. However, writer Akiva Goldsman turned down an offer to write the script. In late 1996, Warner Bros. and Schumacher hired Mark Protosevich to write the script for a fifth "Batman" film. A projected mid-1999 release date was announced. "Los Angeles Times" described their film as "continuing in the same vein with multiple villains and more silliness". Titled "Batman Unchained", Protosevich's script had the Scarecrow as the main villain. Through the use of his fear toxin, he resurrects the Joker as a hallucination in Batman's mind.