This story discusses major plot developments, including the ending and post-credits scenes, in “The Fantastic Four: First Steps,” currently playing in theaters. From the very first scene, the question of what will become of the child of Reed Richards (Pedro Pascal) and Sue Storm (Vanessa Kirby) looms over “The Fantastic Four: First Steps.

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

First Steps was just about reboots and retro vibes, think again. With their First Family, Marvel is cracking open a cosmic door to something far bigger.