Doomsday's Doctor Doom hails from Earth-828, the reality inhabited by Marvel's First Family in The Fantastic Four: First Steps. Read on for

First Steps" star Vanessa Kirby breaks down Sue Storm's birth scene and her mid-credits moment with Robert Downey Jr. as Doctor Doom.

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).

First Steps is roaring into theaters as critics have released some glowing praise for the arrival of Marvel’s first family in the MCU. With the movie having plenty of surprises for the likes of Reed,

As detailed in a new article over at Vanity Fair, The Fantastic Four: First Steps includes a few truly unexpected cameos outside of Paul Walter-Hauser’s Mole Man or its brief nods to other 60’s-era Marvel antagonists. As this site’s own intergalactic herald, may all who pass the purple portent below know they will be irreparably spoiled…

First Steps," starring Pedro Pascal, Vanessa Kirby, Joseph Quinn and Ebon Moss-Bachrach, opened to an impressive $118 million at the domestic box office this weekend, according to estimates released by Comscore on Sunday,