I was skeptical at first.... but yeah I could see it doing 10m+ lifetime sales.

Luke888 said:
I think that's a given, I think it can sell 12/14M units by the end of the PS4 lifecycle, even if that is next year

...and even then its probably gonna be a ever green title.
God of War is iconic to playstation, so even at the end of the lifecycle (ps5 release) it wouldnt just stop selling... the really late PS4 buyers, would probably consider getting a god of war game.