In my studies of Greek and Egyptian myths, it seems that some of the "gods" were really groups.
It may well be that Osiris (Auser) was the chief ruling group of early Kemet. When the myth talks of Seth (Sett) cutting Auser up and distributing his body parts to the 14 districts, this is merely the house arrest of the 14 members of the Auser body.
Then, the Isis (Asett) group brings those members back together to get their blessings on the formation of a new, stronger group -- Horus (Heru).
One story within the myth which seems to support this interpretation more than any other is the story of the fight between Sett and Heru as hippos (submarines?). Asett wounds Sett and he begs for mercy. Asett gives him mercy which enrages Heru, leading to him cutting off the head of his mother, Asett. He hides her head from her in the mountains until it is rescued with help of the sun god, Ra. Now, it makes far more sense that the "head" is merely the leader of the Asett group. Returning the leader to its group is much more believable than the head to a dismembered person.
All of that seemed to take place about 12,000 years ago, right after Atlantis was supposed to have subsided. And Plato's date for that subsidence coincides with 3 events from science that changed the world -- one of them the smoking gun in the story of Atlantis.
So, Osiris (Auser) coming back? That would mean that the old ruling body (confederacy) would be restored to Egypt. Nothing Earth-shattering about that.