Mark my words: Canon will issue an upgrade for the 7D Mark II to do 4K video, just to hold up with Nikons D500. It will record only for a few minutes, like the Nikon counterpart, but is will come.
Why? Because a 7D Mark III is not due for another three years and the dual Digic 6 of the 7D Mark II have the power, as the 1D C does it with Dual Digic 5+.
But no C-Log, as this is reserved for Canons Cinema line.