Jessica Jones, Daredevil, Luke Cage, and the Iron Fist will team up on Netflix for The Defenders. The team first appeared in the pages of each of their respective comics in 1969 and ’70s. They were officially designated as The Defenders in the first issue of Marvel Feature in December 1971. They fought everything from alien wizards to actual eldritch horrors like Null the Lifeless. They even occasionally had the time to fight normal supervillains, too!”]
Source: https://gizmodo.com/the-weird-history-of-marvels-defenders-most-of-whom-ar-1797816973