The Fantastic Four: First Steps
This retro-futuristic Marvel adventure drops the famous superhero family into a 1960s-styled Earth as they face the planet-devouring cosmic villain Galactus, with a strong heart-of-family message running through the action. It earns its PG-13 with frequent comic-book battles, a genuinely imposing villain, and several sequences of peril centered on a newborn baby.
Best enjoyed by kids who are already comfortable with MCU-level superhero action, typically 10 and up, with a parent nearby for younger or more sensitive viewers.
If you’d rather skip
An in-universe cartoon repeatedly shows The Thing with the catchphrase 'It's clobbering time!' and depicts punching and hitting in a slapstick style; fine for most kids but establishes the action tone early.
A highlight reel of the team's past four years shows superhero battles against various foes; comic-book style with no blood or gore.
A building sinks into the ground and Mole Man attacks; a child is nearly crushed by falling debris in this sequence.