Dr. Henry "Hank" Pym is a former member of the Avengers, one of the world´s greatest biochemists and illusionists, along with taking the leading role in the supervillain team, the Sinister Five. Originally serving as the heroic Ant-Man, Hank's life changed after Gwen Stacy's death, the event which shaped and originated the entire Earth-3000 universe. As fate would have it, Pym took the role of Mysterio, the mysterious wizard who has always been a foe to New York's favorite web-slinger, Spider-Man. Thirsting for vengeance and armed with an evil Quentin Beck didn't have, Pym became one of the primary enemies of the post Project: Web Spider-Man, Clint Barton.