Human Grey Hybrids

Hi All, I just watched EA's video on the human hybrid project stating that the next evolutionary stage of humans is a human grey hybrid. These hybrids have been worked on from a genetic standpoint to create the fourth and final (maybe?) version that will be introduced to earth. To keep all the characteristics that have been bred for, they wouldn't be able to breed with humans. So, would there be two races on Earth, the hybrids and the humans? Does this seem concerning as the hybrids would be so much more advanced than humans? Also, is it the intention that the humans be phased out? I'm troubled by this.