We're told that the rumoured new EF-M prime lens that was expected in March for CP+ has been pushed back until later in 2018. Unfortunately we still don't have [CR3] confirmation of the focal length and aperture yet.
It's not unusual for lens announcements to get pushed back. We've seen it with the EF 11-24mm f/4L, the EF 16-35mm f/2.8L III and the EF 85 f/1.4L IS and likely others we're unaware of.
More to come…