In the last two weeks, plaintiffs lawyer Marc Toberoff has seen his assault on Hollywood over superhero copyrights largely wind down. The heirs of Jack Kirby, the creator of the Hulk, Captain America and other superheroes, settled their long-running dispute with Marvel Entertainment on confidential terms. And the estate of Joe Shuster, who cocreated Superman, lost its bid to be heard by the U.S. Supreme Court, leaving it without copyrights to the superhero.

But Toberoff’s last superhero scuffle has not yet been fought to the finish. The daughter of Jerry Siegel, the other cocreator of Superman, is still fighting in the U.S. Court of Appeals for the Ninth Circuit.