The Fantastic Four First Steps’ ending and post-credits scenes explained. Doctor Doom's MCU debut teased as Robert Downey Jr sets up Avengers Doomsday. Franklin Richards' powers revealed.

Galactus ends up giving the Fantastic Four an ultimatum, telling a pregnant Sue that he'll spare Earth if she gives up her powerful unborn child to him. The group declines his deal, which further angers Galactus, sending him on a vengeful mission to both destroy Earth and take Sue’s child.

The Marvel Cinematic Universe officially has its Fantastic Four. Or should we call it five? The new film, which is in theaters now, is largely centered around the fact that Reed Richards (Pedro Pascal) and Sue Storm (Vanessa Kirby) have a child named Franklin.

Credit: Marvel Studios In their MCU debut, the Fantastic Four become a Fantastic Five with the arrival of Reed and Sue's son, Franklin Richards. Worries that he might not be "normal" are confirmed in Fantastic Four: First Steps when Galactus recognises that the boy can wield an unlimited energy known as the Power Cosmic (presumably because of the "cosmically compromised DNA" shared by both of his parents).

As is usually the case with MCU movies these days, The Fantastic Four: First Steps includes both a mid-credits and a post-credits scene. And also sticking to the traditional formula, one is a goofy little stinger, while another has serious ramifications for the MCU.

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

Reed Richards and Sue Storm’s son, Franklin, is poised to be a major player heading into Marvel’s Avengers: Doomsday.

First Steps director Matt Shakman addresses a big Sue Storm moment in the movie's final act and reveals original plans for Franklin Richards' Marvel Cinematic Universe's introduction.