I heard March of 2018 back when this was shown @ e3. Is that still rumored to be the release? We would have heard something by now, surely?
It supposedly has a 25-30 hour main story. https://gematsu.com/2017/12/god-war-25-30-hours-long I'm not sure how I feel about it being as long as the last 3 games combined. I hope the story and gameplay keep me interested enough to finish it. I thought 9-10 hours was just right for the last few games.