Reed Richards and Sue Storm's son, Franklin Richards, will make his MCU debut in The Fantastic Four: First Steps. Franklin's powers to warp reality should put him as the most powerful hero in the MCU. In the comics, he is one of the characters who help recreate the multiverse at the end of Secret Wars. I feel like the timing of Franklin's debut means he will have to play that role in 2027's Avengers: Secret Wars, which means we will likely see Franklin age up in the MCU quite fast.
