Something related to the Ninja Gaiden series appears to be brewing, as announced today by Composer Keiji Yamagishi on Twitter, without giving further details.
I’m pleased to announce that I’m working on a new project related to Ninja Gaiden. I’ll be able to share more news in July! 😄
— Keiji Yamagishi (@MoreYamasan) June 28, 2016
All we know for the moment, is that more information will be coming in July.
Considering that the announcement comes from the series’ composer, we can’t even be sure that the project is actually a game, but we’ll let you know as soon as more is announced.