Ancient Egyptians

[ilabv]

Chalcolithic Iranian admixture through late Ghassulians is plausible but not the main source of the shift. The main change we will see is going to be Levant-like ancestry flowing into lower Egypt after the Old Kingdom period, which honestly doesn't make much sense considering Egypt dwarfed the Levant's population (over a million vs ~100k in 2200 BC respectively).

Which is one of the reasons I very much doubt this scenario. There's ample archaeological evidence of Ghassulian and then, later, seemingly straightforward Mesopotamian cultural impact on Egypt in the 4th millenium BC. There's no such archaeological evidence for the First Intermediate Period. 

Once they work up the courage to test those predynastic Naqada I, II and III remains, I am willing to bet this is exactly what they'll find. Inflows of Isr_C like Levantines for Naqada I, and then samples dominated by Mesopotamian ancestry in Naqada II and III. After a period of genetic diversity in Egypt (there will probably still be almost purely Natufian samples in the Old Kingdom period), these 4th millenium BC inflows will come to dominate the Ancient Egyptian gene pool. The Late Period mummies from the 2017 study look like they would derive most of their ancestry from those relatively late (post-Neolithic) arrivals from the Fertile Crescent.

There won't be anything like this. Naqada had high ANA and their profile was like the Old Kingdom samples minus Levant EBA from pastoralists that entered c. 3700 BC

People keep referring to Natufian because they dont realize there is another population in Egypt, which in part gave birth to Natufians. They are called Nile HG or Nile Hunter Gatherers.

Similar to Natufians but much higher ANA