The Canon RF 35mm f/1.2L USM has been rumored for quite some time, I have been told multiple times that Canon would like a line of f/1.2L prime lenses for the RF mount.
Now I have been told that Canon may also be working on a DS (defocus smoothing) version of the RF 35mm f/1.2L USM to be announced sometime in the first half of 2021.
We haven't seen a patent for such an optical formula yet, but there are a lot of optical formula patents for an RF 35mm f/1.4L USM, including one with a soft-focus setting. It's quite possible that there are a lot of prototypes of these lenses.
This information comes from an unknown source, so treat it accordingly.