Originally Posted by
Habis
Well, humans have several Hulks, Dr. Sampson, Blue Marvel, Sentry, Monica Rambeau, Carol Denvers, Comet Man, Marvel Boy, Thing, Human Torch, Invisble Woman, Mr. Fantastic, Spider-man, Spider-woman, Madam Web, Wasp, Ant-man, Graviton, Sundown, Abomination, Rhino, Sundragon, Firebird... etc.
Many of these can pass down their powers to their children.
And evolution isn't a prophecy and it doesn't work in steps: A species doesn't simply disappear just because another one evolved from it, and several different species can evolve from a common ancestor: coyotes, jackals and wolves all are descended from a common ancestor quite recently; same for brown and polar bears...
There is no reason mutants and humans couldn't coexist side by side. Or other species could evolve from humans beside mutants, like the descendants of Hulk, the 4F, Carol Denvers, Marvel Boy, Comet Man... etc., could pass their powers to all of Humanity...
EDIT: Homo Erectus coexisted with its descendants Homo Ancestor, Homo Heidelbergensis, Homo Neanderthalensis and Homo Sapiens for almost 800,000 years.