I have been told by an unknown source that Canon will announce an RF 85mm f/2 IS STM in 2020.
The same source claims that a whole line of f/2-f/2.8 non-L prime lenses with IS are coming in the next 12 months.
The same source mentions that the line of prime lenses will start at 18mm and go up to 85mm. This seems like pretty wishful thinking from my point of view, but I have been surprised before.
Take this one with a grain of salt until we can confirm the information above [CR1].
The image for this post is of the Canon EF 85mm f/1.8 USM