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 of money with their 1980s children's comics imprint Star Comics and they earned a great deal more money and worldwide success during the comic book boom of the early 1990s, launching the successful 2099 line of comics set in the future ("Spider-Man 2099", etc.) and the creatively daring though commercially unsuccessful Razorline imprint of superhero comics created by novelist and filmmaker Clive Barker. In 1990, Marvel began selling Marvel Universe Cards with trading card maker SkyBox International. These were collectible trading cards that featured the characters and events of the Marvel Universe. The 1990s saw the rise of variant covers,