My guess is we won't see it for another few years sadly since it is a fairly new lens. Canon seems to space out their lenses around 17-25 years HOWEVER we recently have seen Canon do things that don't follow their past record. I hope they jump on the mass production consumer bandwagon since many people upgrade their cameras, iphones, post processing software weekly it seems. ok yearly... but Canon could jump on that as well and people will come up with the money I think. "If you build it they will... blow all their cash"
Canon seems to take around 15-20 years to release new version of L primes and around 20-25 years for non L primes. Quick Ex.
35mm 1.4L released in 1998 and update ii in 2015, 17 years later.
50mm 1.0L released in 1989 and update 1.2L in 2007, 18 years later.
85mm 1.2L released in 1989 and update ii in 2006, 17 years later.
35mm f2 released in 1990 and update ii IS in 2012, 22 years later.
28mm 2.8 released in 1987 and update ii IS in 2012, 25 years later.
1989 and 2006-7 were great years if you were rich and buying up expensive lenses
Maybe 2015-17 will continue though?
Canon Feeeeeeeed us!
What I need is faster AF and no more flybywire focus for running brides! BR would be nice but I'm scared it will take a damper on the bokeh like the new 35mm did a tiny bit. Still it replaced my MKi 35mm hands down just becasue of the CA improvement. But I don't find the 85ii that bad for CA so I don't want them to tamper with the optics. Just the focus...