Now that the DC Universe is underway thanks to the release of Creature Commandos Season 1 to Max subscription holders (and yes, Season 2 is on the way), the next step for this franchise is to release its first movie.

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.