Sigma’s 35mm f/1.4 DG seems to be taking a lot of sales from the current Canon equivalent, here’s hoping that forces Canon’s hand on getting a replacement ready.
The Sigma is cheaper than the EF 35mm f/1.4L mk1, and would be all the more so compared to a mk2.
So Canon would have to either cut the mk2's price or make it a magnificent performer. I wouldn't bet a fart on 1st option, so I guess Canon is taking it's time to make the best 35mm f/1.4 mk2 it can make.
If they make it a 35mm f/1.2 and/or insert IS they can bumb up the price to 1.8K - 2K for me. IS-version is never going to happen, though.