When Dennis is finally released by the CSA, he seeks out the Captain, discovering that not only had his team disbanded, but that the East Coast Avengers team had also just disbanded and that the Captain is seeking new members. The Captain asks Demolition Man to join the Avengers and they immediately leave on a mission at the request of Battlestar. Battlestar's partner is John Walker, Captain America's replacement, who was captured by Flag-Smasher and his group ULTIMATUM. While Battlestar and the Captain investigated ULTIMATUM's Arctic base, Demolition Man is left with their plane. During the fight, the Captain discovers that Flag-Smasher's base contains a doomsday weapon (an electromagnetic pulse generator), and he orders Dunphy to set the plane on course to crash into the base and then bail out. Dennis sets the course, but then sees an enemy agent land on the plane. Dunphy elects to stay on the plane to ensure that it crashes. The plane explodes, apparently with Dunphy in it, and Captain America is unable to find any trace of him.