Superhero fiction fiction. In 1960, DC banded its most popular heroes together in the Justice League of America, which became a sales phenomenon. Empowered by the return of the superhero at DC, Marvel Comics editor/writer Stan Lee and the artists/co-writers Jack Kirby, Steve Ditko and Bill Everett launched a new line of superhero comic books, beginning with The Fantastic Four in 1961 and continuing with the Incredible Hulk, Spider-Man, Iron Man, Thor, the X-Men, and Daredevil. These comics continued DC’s use of science fiction concepts (radiation was a common source of superpowers) but placed greater emphasis on personal conflict and character development.
Marvel Comics brand were the science-fiction anthology "Journey into Mystery" #69 and the teen-humor title "Patsy Walker" #95 (both cover dated June 1961), which each displayed an "MC" box on its cover. Then, in the wake of DC Comics' success in reviving superheroes in the late 1950s and early 1960s, particularly with the Flash, Green Lantern, and other members of the team the Justice League of America, Marvel followed suit. In 1961, writer-editor Stan Lee revolutionized superhero comics by introducing superheroes designed to appeal to older readers than the predominantly child audiences of the medium. Modern Marvel's first superhero team, the titular