Intel has a 22 core 44 thread CPU as it's top of the line multicore CPU at the moment: http://ark.intel.com/products/91317/Intel-Xeon-Processor-E5-2699-v4-55M-Cache-2_20-GHz
Skylake-X being the next gen of the "E" platform was always supposed to up the number of cores from BWE so it's not in the least surprising to see that they are planning a 12 core CPU for its top place.
I doubt that Intel will need it to fight 8 core Ryzen, what they'll need though is to lower the prices on most of their top tier CPUs and thus I can see them introducing a 12 core BWE CPU in place of 6950X with the lowering of prices of 6950X and 6900K.
http://ark.intel.com/products/96900/Intel-Xeon-Processor-E7-8894-v4-60M-Cache-2_40-GHz
is actually their highest end CPU, and you can get 8!