An adaptation of the unproduced Batman vs Superman screenplay from 2002. Codenamed "Asylum", the script was written by Andrew Kevin Walker and Akiva Goldsman. This film would have been an attempt to revitalize the Batman & Superman franchises by pitting the two heroes against each other for the first time on the big screen. Wolfgang Petersen was set to direct with a Summer 2004 release. Warner Bros., however, would later cancel the project in favor of Batman Beyond - another project that would ultimately be abandoned.

An adaptation of Kevin Smith's script for the abandoned Superman film from the late 90s, which would have starred Nicolas Cage as the Man of Steel. This script prompted Warner Brothers to greenlight a new Superman film, and enlisted Tim Burton to direct. Burton would later on recruit his own writers to rework the script before the film was ultimately cancelled.

An adaptation of Dan Gilroy's script for Tim Burton's abandoned Superman film from the late 90s, which would have starred Nicolas Cage as the Man of Steel.