I´m with X on this one.
Besides, I´m really hoping this will take place before he will be a servant of Ares. What I really liked about GoS were the Arms of Sparta... finally a good weapon besides the blades of chaos. So hopefully, they would be your main weapon plus that sword Kratos uses during those flashbacks. It would make a nice change, imo.
But yeah, as if. We´ll probably play as Kratos as he serves Ares, but before he becomes the Ghost.