Tecmo Koei's Ninja Gaiden 3 announcement for gamescom is that the game will fully support PlayStation Move. There are unfortunately no other details beyond that basic fact.
It should be interesting to see how Move works with the series, which has been historically rather punishing. How will it handle at the hardest difficulties, for instance? There's something we should probably know more about.
This is one of those things where it's a nice bonus for those who can make use of it, but otherwise, can't say I really care much. I'm more concerned about the startling lack of dogs with swords in Ninja Gaiden 3 than anything else, at this point. Those guys were hilarious.