I'm calling it now! A 45 minute demo of Kinectimals for the Xbox One. Where not only tigers and bears, but also t-rexes and triceratops can be your pets! (Rumored to have anime girls 'n dudes in Japan.)
Gabe Newell will be seen crying tears of joy and jealously.
No, but seriously, there will also be some Rock Band 4 demos. A few Kinect games, and some stuff we hopefully will see for the first time! (No like leaked last year.)