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 (film) Danvers as she becomes Captain Marvel after the Earth is caught in the center of a galactic conflict between two alien worlds. Development of the film began as early as May 2013, and was officially announced in October 2014, making it Marvel Studios' first female-led superhero film. Nicole Perlman and Meg LeFauve were hired as a writing team the following April after submitting separate takes on the character. The story borrows elements from Roy Thomas's 1971 "Kree–Skrull War" comic book storyline. Larson was announced as Danvers at the 2016 San Diego Comic-Con, with Boden and Fleck brought on board to