When Entertainment Weekly asked Fantastic Four: First Steps director Matt Shakman if Downey Jr. filmed that post-credits scene, the filmmaker pleaded the fifth. "For others to talk about," he teased. However, Shakman did reveal that it was the Russo brothers who helmed the post-credits scene since it was shot for Avengers: Doomsday.

First Steps line up with the end of Thunderbolts* as the franchise builds to the release of the epic Avengers: Doomsday in December 2026? CinemaBlend's own Jeff McCobb recently broached that subject in an interview with director Matt Shakman during the Los Angeles press day for the new 2025 movie,

First Steps, the Russo brothers have teased its connection to their much-awaited MCU movie, Avengers: Doomsday. The directing duo recently took to social media to share a promotional post for the first entry in Phase Six of the MCU,