Marvel's The Fantastic Four: First Steps. (Walt Disney Co./Courtesy Everett Collection)Early reviews for The Fantastic Four: First Steps are in: It's a reboot worth watching.Set in a retro-futuristic, midcentury America, The Fantastic Four: First Steps follows Marvel's First Family - Mister Fantastic (Pedro Pascal), Invisible Woman (Vanessa Kirby), Human Torch (Joseph Quinn) and The Thing (Ebon Moss-Bachrach) - as they work to protect Earth from a planet-consuming space god named Galactus (Ralph Ineson) and his herald, Silver Surfer (Julia Garner).