Batman & Robin director Joel Schumacher’s conception of the fourth entry in the Batman franchise looked very different, and it would have reshaped the DC Universe. Instead of Uma Thurman as Poison Ivy and Arnold Schwarzenegger as Mr. Freeze, the filmmaker sought Nicolas Cage to play Dr. Jonathan Crane/Scarecrow. The sequel would have been called Batman Unchained, and its script was penned by Mark Protosevich, who wrote I Am Legend and Thor. In addition to Scarecrow, Batman Unchained would have adapted Harley Quinn for the big screen, this time reimagined as the Joker’s daughter who wanted revenge for his death.