Nikon filed two more patents (2013-019992, 2013-011831) in Japan for a new full frame 58mm f/1.2 lens. In the past there have been similar patents for a 50mm f/1.2, 58mm f/1.4 and 58mm f/1.2 lenses. Here are the technical details:
Maybe Nikon is really serious about recreating the legendary Ai Noct Nikkor 58mm f/1.2 lens (read more about it here).