A companion open-world video game was developed to extend the film's story.
: The main villain was set to be a modernized version of Brainiac .
Before the project was shelved in favor of a reboot, a sequel was in development for 2009.
: Unlike previous films where the cape often behaved inconsistently, the Superman Returns team used the Syflex cloth simulator to create a digital cape. This allowed the director to manipulate its movement with the same precision as an actor.