Responses

yes, bc this is a time loop, and mc would not exist in the future if he lives and dies in the past and the time loop which brings him to ebis in the first place would happen ykwim? So i think ebis would become a much more significant civilization in history but mimi's petrification will still happen (thus leading to rocky)
Based on the theories posted by the commenters, i have a theory. Maybe Mimi's destiny is to die before his ideals are realized, and anubis uses his petrification power to freeze him before his life goes away, and the way to revive mimi's soul is to mend it with a bit of nunu's soul. So in essence, rocky is mimi+nunu but not as 2 distinct identities. Does that make sense?