Robert Downey Jr.'s Doctor Doom is after Franklin Richards for a major reason, and the new Fantastic Four member should be key to Avengers: Doomsday.

First Steps introduced the character of Franklin Richards in the MCU, theories of him possibly becoming evil in 2026’s Avengers: Doomsday have started surfacing on the internet. An immensely powerful being,

In Marvel Comics, Doom’s fixation on Franklin is legendary. He views the boy’s near-limitless powers as the key to creating and ruling Battleworld, a twisted reality of his own making as seen in Secret Wars.