Major spoilers for "The Fantastic Four: First Steps" follow .
"The Fantastic Four: First Steps" is set in a world separate from most other Marvel Studios' movies. Earth-828, specifically, which resembles a futuristic version of the 1960s where all the decade's pulp sci-fi came true. "First Steps" benefits from this isolation; it's one of the most complete-feeling Marvel Cinematic Universe movies in a long time. It begins, proceeds, and ends on its own terms.
But we knew the Fantastic Four are on the cast list for next year's "Avengers: Doomsday" — Doctor Doom is the Four's nemesis. Besides introducing the Four and their newest member, Reed Richards (Pedro Pascal) and Sue Storm's (Vanessa Kirby) baby Franklin Richards, the movie is light on any "Doomsday" set-up. Until the post-c