Iron Man splits the team in two with Cap, Falcon, Thor and Loki to search for Dr. Doom while Hulk, Hawkeye, Black Widow and he mounts a defense against Doomstroyer to which Hulk replies, "Defense? Do I look like a defender to you?" The reference is a nod to the Hulk being a core member of The Defenders along with Dr. Strange and Namor. Their first appearance together was in Marvel Feature #1, December 1971. They later got their own title in 1972.