Canon is rumored to announce next f/1.2 prime in 2020 and it would be the Canon RF 35mm f/1.2L USM Lens.

The company is planning to release more f/1.2L prime lenses in the near future. After release of RF 50mm f/1.2L and RF 85mm f/1.2L USM lenses the next f/1.2L lens could be RF 35mm f/1.2L USM Lens, release date in 2020.
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https://www.dailycameranews.com/2019/08/canon-rf-35mm-f-1-2l-usm-lens-to-be-announced-in-2020/