TMDb/Avengers: Age of Ultron TV Revisit the MCU before Avengers: Doomsday hits theaters. The Russo Brothers return to direct an all-star cast in the first Avengers film since Endgame. April 19, 2026 AceShowbiz - As anticipation builds for the release of the next big Marvel movie, Avengers: Doomsday, audiences are revisiting previous Marvel Cinematic Universe (MCU) films to refresh their memories. The upcoming film, set to premiere in theaters on December 18, 2026, marks the first Avengers installment since the record-breaking Avengers: Endgame in 2019.