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 (DC Comics) with "Justice League" #21, preceding DC's crossover storyline "Trinity War" which heavily features the Shazam mythos. Johns and Frank's reboot was met with both acclaim and criticism, and the renaming of the hero as Shazam brought mixed reactions. Johns noted that the change was made "because that's what everyone thinks his name is anyway," due to the inability to use the "Captain Marvel" moniker on comic book covers and merchandise. In updating "Shazam!," Johns and Frank skirted some controversy among long-time fans by introducing Billy Batson as a cynical foster child who comes to appreciate his potential as a hero