John Byrne built his reputation on superheroes. His long runs on The X-Men, The Fantastic Four, The Incredible Hulk, and Superman are considered by much of fandom to be the quintessential periods for those popular titles. In 1994 he made his return to super-action superheroes with the four-issue miniseries, Danger Unlimited. It was an instant sellout and fans everywhere were clamoring for more!