I received some information that Zenit will be stepping up their game in 2020 and has planned at least three new F-mount lenses (see also this post):
Zenit is also working on new lenses for Nikon with autofocus and electronic coupling (electronic aperture control). Their new lenses will be with new optical designs (not taken from older lenses).
Zenit also has the Zenitar 50mm f/0.95 full-frame lens that could easily be made for Nikon Z-mount.
Zenit now has an official website in the US: https://zenit.store. Zenit lenses are also sold at Amazon.
Here is a close-up of the upcoming Zenitar 1.2/50EA and 2.8/60 lenses: