This is the 2nd time that a f/2.8-4.0 wide angle zoom has been mentioned.
This is a patent for an EF-S or EF-M 17-35mm f/2.8-f/4.0 lens
And two 14mm f/2.8 lenses.
The current 14mm f/2.8 I and II is a joke especially with the Samyang 14mm f/2.8 out there which in my experience owning all 3 the Samyang is the winner, and you barley need to focus on such a wide lens anyways.
The 14-24mm f/2.8 is an absolute joke especially compared to the 14-24mm f/2.8 from nikon or if you are willing to sacrifice fov the 17mm TS-E is so much better. I would pick any of those lenses before I went with Canon's one.
Anyways this patent also brings up an interesting idea, a 14-30mm f/2.8-f/4.0 lens. That's something I could get behind.