I just noticed something very interesting after watching the GOW demo again. As the camera pans around to show you the dev who'd been playing it, you see another guy sitting next to him who's clapping, but beside him is another active controller. Would it perhaps have co-op? One plays Kratos while the other plays his son?
https://youtu.be/GwofRzkROo4?t=44m31s
The PS5 Exists.