A couple of the guys from Premium Agency are also registered as attending the show. Katsunori Yamaji and Jarik Sikat. Yamaji worked on Shenmue as the chief motion camera director. Sikat is probably just there to translate.
Yu Suzuki is involved with a couple of Premium Agency's mobile games as an advisor, but he was also supposed to be working on a fighting game for Kinect. I think odds are very good that the Kinect game is what we will be seeing at the show.
The hints he's dropping on his twitter do also suggest something Shenmue related, but I'm trying to curb my enthusiasm on that matter for the time being.