Nikon has new patents filed in Japan for a 52mm f/0.9 and 36mm f/1.2 full frame mirrorless lenses:
Nikon 52mm f/0.9 full frame mirrorless lens
Nikon 36mm f/1.2 full frame mirrorless lens
Nikon has already filed several patents for full frame mirrorless lenses in the past. Patents are no guarantee for future products, but I think everything so far points to a new full frame mirrorless camera with a new mount that can accommodate a 50mm f/0.9 lens.
Like the new Nikon Mirrorless Camera Facebook page and join the growing Nikon Mirrorless Camera Facebook group for a more detailed coverage of the upcoming Nikon mirrorless camera.
Via hi-lows-note