Franklin Richards' reality-warping vs Galactus's Power Cosmic: Here is who we think is the strongest in the MCU after The Fantastic Four.

First Steps introduces plenty of characters to the MCU, but its strongest one isn't Galactus or Franklin Richards.

In a 1982 arc by John Byrne, Franklin gets frustrated trying to solve a Rubik’s Cube and uses his powers to age himself into an adult body, though he couldn’t actually gain more emotional maturity. He winds up going back to being a kid, placing restrictions on his own abilities to allow him to have something of a normal childhood.