How Franklin Richards, the power cosmic and Doctor Doom's appearance in "The Fantastic Four: First Steps" credit scene affects "Avengers: Doomsday."

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.

First Steps. The Fantastic Four: First Steps has achieved lift off in theaters – and I imagine you have plenty of questions about the Marvel movie's ending and its post-credits scenes. Below, I'll do my best to answer your biggest questions about the first Marvel Phase 6 project,