The upcoming EF 135mm f/2L IS USM lens is rumored to be announced around in the first half of 2018, likely at CP+ Show in Japan in February, 2018. According to CR.
According to CR, this old non-IS version 135mm lens will still for sale for some time after new lens announced. The announcement of this new 135mm f/2L IS lens will after the EF 85mm f/1.4L IS meet global demand.
Currently, there are other Canon products rumored to be announced next year:
- Canon EOS 7D Mark III
- Canon EOS 90D
- EF 200-600mm f/4.5-5.6 IS USM Lens
- EF 50mm f/1.4L IS USM Lens
- EF 24-70mm f/2.8L IS USM lens