This Square Enix & Team Ninja Cross-Over JRPG was announced during a live-stream of Dissidia Final Fantasy (Arcade). It appears to be a traditional JRPG and not having fighting game elements. More information will likely come out soon, considering its headed for a JP launch later this year.
Coming to iOS/Android in Japan in 2016.
Japanese site: www.jp.square-enix.com/DFFOO/