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
Hasbro Comic Book Universe universe entirely. Hasbro Comic Book Universe The Hasbro Comic Book Universe (HCBU) is an American comic book franchise and shared universe created and published by IDW Publishing, based on various properties of the toy company Hasbro. Following the bankruptcy of Dreamwave Productions in 2005, IDW picked up the "Transformers" comic book license and hired veteran writer Simon Furman to craft a rebooted continuity based on the toy line, similar to what Marvel Comics did through Ultimate Marvel. In May 2008, IDW obtained the "G.I. Joe" comic book license from Devil's Due Publishing. In 2016, IDW gained the rights of "Rom",