We've received another mention of a Canon EF 135mm f/2L IS USM coming in the first half of 2018, we see the CP+ show in Japan as a good time to announce the lens.
We're told production of the EF 85mm f/1.4L IS will have to meet global demand before the announcement.
We're also told that the original non-IS version will remain current for some time after the new lens appears.