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
G.I. Joe: A Real American Hero (Marvel Comics) Joe: A Real American Hero" #1, it was the first time a commercial had ever been used to promote a comic book. Since the commercials were technically promoting the comic books rather than the toys, they allowed Hasbro to circumvent television regulations mandating that toy commercials could not contain more than ten seconds of animation. By not showcasing any characters and toys outside of the comic book context, they were able to include a full thirty seconds of animation. Marvel was paid $5 million by Hasbro to produce the commercials through its animation division Marvel Productions. Larry Hama relates the