Unfortunately, aside from the news of the game existing, not much else is known -- the publishing rights holder, Sega, has yet to respond to a request for comment, nor had Mr. Brushett. And other than the news that the game will likely feature "hand painted and photo referenced textures," the resume doesn't illuminate anything else about the game.
You might say that information about Shinobi 3DS is hiding in the shadows, like a ninja, waiting to strike. And considering how strong our ninja detecting skills are, we'd wager E3 is a likely time for that strike. The "strike," likely, will just be a press release, so don't worry.
Update: Sega told us it isn't offering a comment at this time.