"What if the Fantastic Four's second child had lived?" There are actually two answers to this question, and as you'd expect from What If, one is really, really depressing and one is uplifting. First up, the depressing one. Basically Franklin knows from the pregnancy that his baby sister is evil and horrible, but no one will believe him. Once she's born people start dying. Reed is such a tool in this story he actually hits Franklin when Franklin continuously accuses his sister of killing Ben, Alicia, Johnny, Sue... So, who does a teenage boy turn to in a case like this? Doom of course. So, yeah, turns out Franklin was right and little sister was a succubus. Nice. In the other story everyone lives and the second Richards kid brings about worldwide peace and unity.