Update: there will be two versions: RF 85mm f/1.2L USM Lens and RF 85mm f/1.2L USM DS Lens.
Nokishita Camera has just confirmed Canon RF 85mm f/1.2L USM DS Lens. The DS stands for “DEFOCUS SMOOTHING”. This is the sixth RF lens to be announced soon, see previous 5 RF lenses.
You can see DEFOCUS SMOOTHING Trademark Information here