A Los Angeles federal judge legally denied the effort taken by heirs of Superman co-creator Joseph Shuster to reclaim their 50 per cent interest from the fabled Kryptonian superhero, reported Ace Showbiz.
Judge Otis D Wright II of Federal District Court ruled that a 1992 binding agreement between Shuster's sister Jean & brother Frank and DC Comics had prevented the siblings from attempting to terminate copyrights.
In the agreement, Jean forfeited rights in return for Warners' settling of Frank's debts and payment of USD 25,000 a year for the rest of her life.
"The court finds that the 1992 agreement, which represented the Shuster heirs' opportunity to renegotiate the prior grants of Joe Shuster's copyrights, superseded and replaced all prior grants of the Superman copyrights. The 1992 agreement thus represents the parties' operative agreement and... Is not subject to termination," Wright said.
The judge added, "By taking advantage of this opportunity, she Jean exhausted the single opportunity provided by statute to the Shuster heirs to revisit."
Superman, first created in comic form in the 1930s, has become one the most valuable franchises for Warner Bros. The legendary character has generated over USD 500 million domestically from five movie adaptations. It also grossed billions of dollars from toys, games, comic books and TV series such as "Smallville".
With the ruling, Warners and DC Comics are now allowed to move forward with their plans to produce the sequel to upcoming "Man of Steel" if the big-budget movie proves successful.
The studio can also move forward to produce DC's "Justice League" movie, which would have been impossible without the appearance of Superman.
