The Fantastic Four: First Steps' mid-credits scene introduces Robert Downey Jr.'s Doctor Doom, and while the second stinger is a little less impactful, it does reveal what many of Earth 828's classic villains look like. Red Ghost, Diablo, The Mad Thinker, and more are all referenced during The Fantastic Four: First Steps, but never seen. Polygon recently spoke to Titmouse animation director Simón Wilches, who spearheaded the creation of this animated sequence for Marvel Studios. We wanted to feel nostalgic, but a little bit more modern, to fit the movie," Wilches added. In the meantime, watch The Fantastic Four: First Steps' post-credits scene below.