A precursor: this is in no way official.
That said, the internet is ablaze this evening with the first sighting of anything remotely concrete on God Of War 4, albeit on a tiny, tiny scale.
Apparently picked up by SystemLink not long ago, a LinkedIn profile has all but confirmed Kratos will be returning with just the following line on someone’s CV:
Game Cinematic for God of War 4 Cinematic Test (PS3)
What’s most interesting is that the work done for said cinematic was at some point last summer, suggesting that if Sony Santa Monica are working on a new GoW title, it’s been going for a little while.
The company in question appears to be one Motion Logic, who claim they’re working on in-game animations for an “unnannounced AAA title”.
If this all ties together, this is the sort of news PlayStation fans will be jumping at: the God of War series is a phenomenal one, and we can’t wait for the next in the series.