Conway returned to DC Comics in mid-1975, beginning with three books cover-dated Nov. 1975: "Hercules Unbound" #1, "Kong the Untamed" #3, and "Swamp Thing" #19. He wrote a revival of the Golden Age comic book series "All Star Comics" which introduced the character Power Girl. Shortly afterward, he was chosen by Marvel and DC editors to script the historic intercompany crossover "Superman vs. the Amazing Spider-Man" #1, a 96-page, tabloid-sized, $2 one-shot, at a time when comic books sold for 25 cents.