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 America (comic book) for him to go. We really need him now." Artist Alex Ross designed a slightly revised Captain America costume that former sidekick Bucky Barnes began to wear as the new Captain America in vol. 5, #34 (March 2008). As of 2007, an estimated 210 million copies of "Captain America" comic books had been sold in 75 countries. The storyline of Rogers' return began in issue #600. Marvel stated in May 2011 that Rogers, following the public death of Bucky Barnes in the "Fear Itself" crossover, would resume his Captain America identity in a sixth volume of "Captain America", by writer