History
Sentry shared a similar history to his Earth-616 counterpart up until during the return of Hulk to Earth. With the Sentry appearing to be defeated Reed Richards and Tony Stark, asked him to hold the Hulk in place attempted unleash an energy blast on the Hulk to subdue him. However, the energy blast unleashed a massive energy wave from both the Hulk and Sentry which killed everyone present, including Reed, and turned New York City into an irradiated wasteland.[1]