If you want to know more about the upcoming PS4 exclusive NiOh, Koei Tecmo just teased some news coming next week on its official Twitter account.
— KOEI TECMO EUROPE (@koeitecmoeurope) July 15, 2016
At the moment we know that a beta version will be made available on the PlayStation Store in August, so the news might be related to that. A release date is less likely, since it probably depends on the results of the beta, but this is just my personal speculation.
We’ll have to wait for next week in order to know more.