ZEN Studios, developers of ZEN Pinball and Punisher: No Mercy on the PS3, as well as Ghostbusters and Mushroom Men on the DS, sent us a cryptic message containing this image of Ryu Hayabusa and Ayane.

With Ninja Gaiden Sigma 2's release already behind us, this looks like a good time for some kind of cross-promotional title. Perhaps one involving flippers?

Whatever it is, you've got the rest of today for wild speculation. They'll be making their official announcement tomorrow on the Playstation Blog.