Batman: Glorius Final

Following the cancellation of Batman Unchained and Batman: DarKnight, Warner executives Lee Shapiro and Stephen Wise planned a new film for the series titled Batman: Glorious Final. It was presumably going to have Michael Keaton come back as Batman after George Clooney stepped out of all future Batman films. The project started in 2000, but was suspended in 2002.

Plot
Batman and Robin face against Killer Croc after he brings back the Joker (Jack Nicholson) from the dead.

Why It Was Cancelled

 * The cancellation reasons are currently unknown.
 * The original Batman franchise was permanently dead after Batman & Robin.

Results

 * The film was permanently cancelled following the failure of Batman & Robin.
 * The Batman series was rebooted in 2005 with Batman Begins.