If this ever will become a real product I swear I will run naked on the street :)
Nikon patented a 35-50mm f/1.2 and 50-70mm f/1.2 lens! I guess they are only doing this for fun, just to show off what could be technically possible but still financially crazy. Below you can find the schematics and exact specs mentioned by the Japanese patent:
Focal length: 35.00-51.60
F value: 1.23
Angle of view: 72.14-46.70
Image height: 21.70
Overall length: 210.04-168.19
Back focus: 17.77-25.82
Focal length: 51.60-70.00
F value: 1.23
Angle of view: 48.78-34.53
Image height: 21.70
Overall length: 210.03-169.53
Back focus: 18.93-26.72
via Asobinet