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 cast revealed which Marvel characters they’d recruit to join their team, naming several surprising X-Men picks. While Black Panther and Spider-Man were popular choices, Mystique stood out as a favorite among the cast.

Long story short, Magneto and Professor Xavier were essentially amalgamated into an unstoppable threat named Onslaught, who terrorized the entire Marvel universe. The Avengers and Fantastic Four combined forces and sacrificed themselves to weaken him long enough for the X-Men to finish off Onslaught.

First Steps” is the third Marvel movie to hit theaters this year, but it packs way more hidden references and nods than “Captain America: Brave New World” or “Thunderbolts.” It’s not on the same level of Easter eggs as last year’s “Deadpool and Wolverine,

It seems the Marvel Cinematic Universe and the Fantastic Four needed one another. The creation of Marvel greats Stan Lee and Jack Kirby, the latter quartet of heroes — Reed Richards/Mister Fantastic,

As Fantastic Four: First Steps heads towards its final act, the group is torn between two impossible choices: sacrifice all of Earth to Galactus, or Reed and Sue must give up their child Franklin, who contains the Power Cosmic and enough energy to satiate Galactus' hunger.