Planning to do a whole video about it, but the Mutants of Okaara gotta be the Cheyarafim from "The Draco" Story-line, who fought Nightcrawler's Dad Azazel &
His Neyaphem in ancient times. Probably gonna be revealed sometime soon, either during the event or only after Azazel see's the White Sword, or something.
Just look at the Biology of the 2 Groups or at least their descendants.
The Worthington Family / Bird-Winged Dudes, which we keep seeing on Arakko
The Guthrie Family / While seeming to have a predisposition to flying abilities, they actually possess a wide range of powers like Laser Eyes, & even the potential to produce an External, aka the young immortal Cannonball.
The House of Genesis, like the Guthries, possess a highly variable X-Gene able to consistently give longevity, though War can likely thank her Father Apocalypse for her ability, due to it's similarity with her half-brother Genocide / Holocaust.
The Summoners School seems to predate the Amenthi Invasion, because we see a female summoner in Arakko's Hand when he Horsemen leave Earth. The Summoners are likely the ones who sealed the Neyaphem away in the Brimstone Dimension, the only question is what extra-dimensional force they serve, key
Candidates are Shuma-Gorath or whoever Kulan Gath served in the Hyborian Age