I saw the GoW 3 ending, I know, Kratos kills himself...or it seems. Obviously video game developers have pulled these kind of things together in the past.
How could it work? Who would the villain/s be?
Throw any speculations that may be treated as fact in the future.
I know, God of War Ascension is coming out early next year. Guess what? Not a sequel. That is a prequel so it won't be God of War 4 by any stretch of the imagination. God of War .5, maybe.