Nikon filed a patent in Japan for a new 28-80mm f/3.5-5.6 VR full frame mirrorless lens. I do not remember seeing something similar in the past. Could there be a new FX system on the horizon for 2015? Nikon already had an AF 28-80mm f/3.5-5.6D lens designed for DSLR cameras that has been discontinued for a while.
Two other recent Nikon patents – continuous bracketing shooting with a rotating PL filter:
and a solution that can capture visible and infrared light at the same time and use the color information from the visible light to add color information to the infrared light – this will help to obtain better IQ when shooting in low light: