Razer is going to showcase a new mouse during CeBIT. Info is scarce at the moment, so we will just have to wait for the show.
The only thing we know is that it will have something to do with speed and light, since the marketing campaign for this new mouse is called "Speed of (The) Light."
The only information we have is on the picture below, which actually doesn't show anything new except that the surprise is either a new mouse, or a new laser technology with a higher DPI.
You can find the promotional site here, so you can check out the teaser for yourself.