The 1990s saw the Green Hulk return. In issue #377 (Jan. 1991), the Hulk was revamped in a storyline that saw the personalities of Banner, Grey Hulk, and Savage Hulk confront Banner's past abuse at the hands of his father Brian and a new "Guilt Hulk" persona. Overcoming the trauma, the intelligent Banner, cunning Grey Hulk, and powerful Savage Hulk personalities merge into a new single entity possessing the traits of all three. The Hulk also joined the Pantheon, a secretive organization of superpowered individuals. His tenure with the organization brought the Hulk into conflict with a tyrannical alternate future version of himself called the Maestro in the 1993 "Future Imperfect" miniseries, who rules over a world where many heroes are dead.