The initial Justice League lineup included seven of DC Comics’ superheroes who were regularly published at that time: Superman, Batman, Aquaman, Flash, Green Lantern, Martian Manhunter, and Wonder Woman. Rarely featured in most of the stories, Superman and Batman did not even appear on the cover most of the time. Three of DC’s other surviving or revived characters, Green Arrow, the Atom, and Hawkman were added to the roster over the next four years.
The title’s early success was indirectly responsible for the creation of the Fantastic Four. In his autobiography Stan Lee relates how in 1961, during a round of golf, DC publisher Jack Liebowitz mentioned to Marvel-Timely owner Martin Goodman how well DC’s new book (Justice League) was selling. Later that day Goodman, a publishing trend-follower aware of the JLA’s strong sales, told Lee, his comics editor, to come up with a team of superheroes for Marvel.