I would not be surprised if they stopped making the 1DC. It is a camera that never made much sense to me, though I know a few people here have one.
Believe it or not, there are so many people like you... its weird... you probably think a stills camera is for pictures only and a camcorder is for video only...
You shouldn't jump to such as assumptions.
I use my 1D X for both my still work and my video work, and am extremely pleased with it. It is an amazing camera for stills and produces amazing results for video.
Considering the price of the 1D C, I would always take two 1D Xs over just one 1D C. Every day of the week.
But that is just my opinion.
Oh... true... but there is so much more than just 4K on the 1DC.
There is various different formats including super 35mm and 1080/60p.
I guess, you have to assume that there are people out there that want internal 4K and FF.
Also, with the current price reduction @$9999, you can only get one 1DX and probably a 5DIII
I think you will be able to quite easily find two 1DXs for US$ 10,000. For that extra dollar I am sure you can persuade the shop, or at the very least borrow from someone!
I know what you mean about 4K, and I would like it, but for the videos (and stills) I do, I think getting two 1DXs is a much better idea. But that is just me, some people will prefer the 1DC and maybe two of them. Good luck with whatever you want, and whatever you use, but I would not be surprised if they stopped the 1DC series.