The Japanese website Nokishita confirmed on Twitter that one of the upcoming new Nikon lenses will be:
Nikon NIKKOR AF-S 8-15mm f/3.5-4.5E ED fisheye lens
This information matches with what I have been reporting for the past few weeks.
Update #1: The prices of the three new lenses can be found here.
Update #2: Here is the patent for the new lens:
