I only give you some hints. I don´t describe the technical and optical problems and let out a lot of informations.
I don´t give you any informations what prototype(s) hits the market.
I don´t say anything before Canon announce the introduction of the lens for the first time.
And I don´t post pictures made with the 1D X, 1 Ds Mark III, 5D Mark III and 5D Mark II.
This website lives form hints gives by photographers or the producers.