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.

You want to know if there are any post- or mid-credits scenes in The Fantastic Four: First Steps. The answer is yes, there's both. There’s a lot riding on The Fantastic Four: First Steps. It’s the film that finally introduces the iconic team to the MCU (even if they aren’t on the right Earth just yet).