[miro]

In patents that surfaced last year, there was mention on a 52mm (50mm) f0.9 and a 36mm (35mm) 1.2 lens.
https://hi-lows-note.blog.so-net.ne.jp/2017-09-07

Might be. In Nikon and other rumors, 58/0.95 is mostly mentioned. 
Whichever comes out,  certainly it is a niche which makes sense for Nikon, now that they will have big mount and short flange distance.

With overall market under pressure, small DOF / low light is an area that can be profitable and can find it’s user base.

Lets be patient and wait. Wi will see what comes first.
M\\My personal opinion - building first 58/0.95 seems like building a new house without fundamentals.