Marvel Studios' Avengers: Doomsday - First Trailer | Robert Downey JR. | Dec 18, 2026

A fan-made concept trailer has been created for the fictional film "Marvel Studios' Avengers: Doomsday," purportedly scheduled for release on December 18, 2026. The proposed installment is positioned as the fifth core entry in the Avengers series, aligning with Phase Six of the Marvel Cinematic Universe narrative structure. The concept suggests direction by the Russo Brothers—Anthony and Joe Russo—and a massive crossover event involving established teams such as the Avengers, the Fantastic Four, the X-Men, and the Wakandans, alongside the New Avengers.

This speculative preview indicates that the central conflict would involve the formidable antagonist Doctor Doom, with the concept casting Robert Downey Jr. in the role. The hypothetical plot centers on these disparate hero teams uniting against this major threat within the expanding Multiverse Saga framework.