The post-credits scene is far lighter, and doesn't hint at future stories. Instead, it's an animated sequence shown on an old-timey television — more specifically, it appears to be the theme song of the "Fantastic Four" television show that exists in-universe.

First Steps" has a thrilling ending that teases Dr. Doom and where the MCU goes from here in "Avengers: Doomsday."

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