The post-credits scenes of Fantastic Four: First Steps and Thunderbolts are not directly connected. However, it could point towards what we could see in Avengers: Doomsday. There's a chance that the post-credit scene of Fantastic Four: First Steps kicks off Avengers: Doomsday, as Doom might kidnap Franklin and escape to Earth 616.

First Steps features what might be the most important MCU mid-credits scene since Thanos first appeared in The Avengers. Not only does it introduce one of Marvel's most iconic antagonists, it also teases why the Fantastic Four might have jumped to the main MCU universe,

First Steps' includes two post-credits scenes. Here's how that big reveal sets up what's coming in Phase 6 of the MCU.