The estate of Superman creator Joseph Schuster is suing Warner Bros. Discovery and DC Comics alleging that its planned release some key territories is illegal.

The estate of one of the co-creators of “Superman” has sued Warner Bros. Discovery (NASDAQ:WBD) to prevent the release of the latest movie featuring the comic-book character this summer in a number of major overseas markets,

The estate of Superman co-creator Joe Shuster sued DC Comics and Warner Bros. on Friday, seeking to invalidate the companies’ copyrights in several foreign markets. The suit revives a long-running dispute that was last addressed by the 9th Circuit Court of Appeal in 2013.