Overview

• Robert Downey Jr. makes his MCU debut as Doctor Doom during The Fantastic Four: First Steps mid-credits scene.
• The scene shows Doom crouched before a four-year-old Franklin Richards, hinting at his interest in the child’s cosmic abilities.
• On release day, Downey Jr. posted an Instagram Story featuring his son’s song “Change of Scenery” and a copy of West Coast Avengers #35 as cryptic clues to his Doomsday role.
• Directors Joe and Anthony Russo urged audiences to stay for the credits with the tagline “DoomsdayIsComing,” reinforcing Phase Six’s post-credits world-building approach.
• Wyatt Russell’s confirmed casting in a New Avengers roster signals the expansion of multiple Avengers teams ahead of the 2026 film.