According to recent rumors, the Zenitar 50mm f/0.95 lens for Sony full frame E-mount cameras to be announced on March 15. The new lens will be produced in the Krasnogorsky plant by Shvabe Holding.

Even the Zenitar 50mm f/0.95 lens will be designed for Sony E-mount system, other mounts could follow. So there is a possibility that we might see this fast prime optic on Canon EOS R and Nikon Z models.
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https://www.dailycameranews.com/2019/03/rumors-zenitar-50mm-f-0-95-full-frame-e-mount-lens-coming-on-march-15/