User blog comment:Mr. Xemnas/PLANET HULK SET FOR 2015 WHAT!!!!!!!!!!!!!! AVENGERS 3WORLD WAR HULK?????/@comment-5473242-20130207024651/@comment-1895174-20130209013943

The Avengers surfaced when Stan Lee got a letter of a fan saying how much he loved how interconnected the Marvel heroes were (such as appearing in others comic), that he decided to conect them even more by making a team of individual heroes.