Captain Marvel (DC Comics) abilities. Based on book sales, the character was the most popular superhero of the 1940s, outselling even Superman. Fawcett expanded the franchise to include other "Marvels", primarily Marvel Family associates Mary Marvel and Captain Marvel Jr., who can harness Billy's powers as well. Captain Marvel was also the first comic book superhero to be adapted into film, in a 1941 Republic Pictures serial titled "Adventures of Captain Marvel". Fawcett ceased publishing Captain Marvel-related comics in 1953, partly because of a copyright infringement suit from DC Comics, alleging that Captain Marvel was a copy of Superman. In 1972, DC licensed the
Captain Marvel Jr. Junior returns to Fawcett (and "The Power of Shazam!" comic with issue #42) and makes amends with Captain Marvel. Another superhero team, The Outsiders, found themselves in a battle against Ishmael Gregor, who had killed Timothy Barnes and stolen his Sabbac powers. Captain Marvel Jr. arrived to help the Outsiders dispatch Sabbac, and some time later Junior would join the team for a brief period. Following the "Infinite Crisis" crossover event, Junior briefly joins the depleted Teen Titans roster during the weekly "52" comic book series, and is part of the wedding party for his former enemy Black Adam's marriage