Just this morning the Japanese Xbox website featured the very first images of what appears to be Ninja Gaiden 2, the real sequel to the original Xbox game. Though the screenshot are very small and don't show much, at midnight we can perhaps watch the first trailer from Ninja Gaiden 2.
Why? On the US Xbox website a Countdown just appeared, which at the time of writing runs out in 6 hours. Altough there is not much to see, there is a Chinese/Japanese theme on the background, which could mean a trailer for Ninja Gaiden 2, or maybe just the official announcement. So keep watching the countdown!