Egami, the Japanese Photography blog has uncovered new Canon patents. They are designed for smaller sensors and apparently use fiber optic plates to work around the curvature of the focal plane. Three focal lengths are identified : 12mm f/1.2 ; 6.7mm f/1.4 and 3.6mm f/1.2
It is important to point out Canon patents thousands of designs every year and the chances of any patent making it to the market is very small. You can read the original article in Japanese here.