We're told that that Canon will replace their 35mm f/1.4L following the announcement and shipping of the upcoming EF 11-24mm f/4L, which has been rumoured since August. We're told that an announcement date hasn't been set, however the lens could appear as early as Q1 of 2015, or fall into the second quarter of next year.
This lens has been rumoured for replacement since the EF 24mm f/1.4L II was announced back in 2008. There have been a lot of patents for such a lens, but nothing has come to fruition.
cr