Captain Marvel (DC Comics) Comics" #21 (1941) introduced the Lieutenant Marvels: three other boys named "Billy Batson" who could also become adult superheroes. Captain Marvel, Jr., the alter-ego of disabled newsboy Freddy Freeman, debuted in "Whiz Comics" #25 (1941). Mary Marvel, alter-ego of Billy's twin sister Mary Batson, first appeared in "Captain Marvel Adventures" #18 (1942). In contrast to Captain Marvel and the Lieutenants, both Mary Marvel and Captain Marvel, Jr. remained kids in superhero form, and were given their own eponymous books in addition to appearing as the lead features in "Master Comics" and "Wow Comics", respectively. Captain Marvel, Captain Marvel Jr., and
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