*Thunderbolts* sets up Sentry's *Doomsday* role

The Sentry's introduction in *Thunderbolts* sets the stage for his potential role in *Avengers: Doomsday*, with actor Lewis Pullman cast in the upcoming film. The film explores the hero's dual nature, including the dangerous Void persona. *Thunderbolts* establishes the Sentry's origin through an unethical experiment, creating a hero with immense power but also a volatile, trauma-induced alter ego. The film's plot involves the team trying to help Bob, the Sentry's human identity, control the Void. The post-credits scene hints at the Sentry's future involvement in the MCU, potentially facing Doctor Doom in *Avengers: Doomsday*. The film's plot may force Bob to embrace his powers, possibly unleashing the Void.