If canon were to seek to offer the benefits associated with a leaf shutter then I think the more likely route would be to equip a camera with a fast electronic shutter - i.e. a faster electronic readoff sensor, perfectly feasible with CCD based cameras at present in high end conventional video cameras. This would also solve artefacts such as rolling shutter.
I know the CMOS technology is in some regards catching up with CCD's, but I'm very surprised the likes of Sony, who pioneered FIT ccds 15 years ago -and who are very keen on making sure Canon don't steal the industrial camcorder market- haven't jiggled some of their tech around.
We know Sony can make CCD's this size, the challenge is can they do it with a fast enough read-off, and enough megapickles for stills users and at a reasonable cost.
I would say that this kind of approach, which wouldn't require special lenses, and is camera based, at a premium for those who need it (studio photographers) would be a practical way forward. Ideally for us of course, Canon would either develop such a chip themselves, or buy it in from Sony (and why not? historical precedent, dividends for Pentax and Nikon if you DXO watch..)
In short, the solution is electronic, not mechanical.