TMDb/Avengers: Doomsday Movie Avengers: Doomsday star assures fans the massive MCU crossover avoids shallow cameos, promising meaningful character moments for the huge ensemble cast. March 20, 2026 AceShowbiz - Avengers: Doomsday is gearing up to be one of the most expansive crossover events in the Marvel Cinematic Universe (MCU), sparking concerns among fans about whether the large cast will result in shallow character appearances. However, Lewis Pullman, who stars in the MCU as Bob Reynolds/Sentry, recently assured audiences that the film will be much more than a simple collection of cameos.