Not physically, but their personality will not change, they are again rising to power and many human rights will slowly be removed a little at a time so no-one will realize the change as it occurs. Their advantage is that they have the spirits of the Giants those who died before the Flood to carry out their agenda covertly, spirits are invisible.

Those humans who have sided with them in the past as those who have/are doing in the present is simple, the soulless humans get to rule over mankind and therewith have us slaving to them as they ride private jets, cars, catered around the clock in return to carry-out the Nephilim agenda to forfeit GOD'S plan in punishing their fathers the fallen Angels.