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 Marvel (Marvel Comics) Captain Marvel (Marvel Comics) Captain Marvel is the name of several fictional superheroes appearing in American comic books published by Marvel Comics. Most of these versions exist in Marvel's main shared universe, known as the Marvel Universe. Following a trial in which DC Comics sued Fawcett Comics for breach of copyright, claiming Fawcett's Captain Marvel was too similar to Superman, the latter stopped publishing Captain Marvel. In the late sixties Marvel gained the trademark "Captain Marvel" with their first series. To retain their trademark, Marvel has had to publish a "Captain Marvel" title at least once every two years since,