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. one designated Earth-5. As a result of Marvel Family foe Mister Mind eating aspects of this reality, it takes on visual aspects similar to the pre-"Crisis" Earth-S, including the Marvel Family characters. The names of the characters are not mentioned in the panel in which they appear, but a character visually similar to Captain Marvel Jr. appears. Based on comments by "52" co-author Grant Morrison, this alternate universe is not the pre-Crisis Earth-S. Freddy Freeman first appeared in issue 13 of this book; he was shown crippled and in a wheelchair, the result of being inadvertently injured in a previous