I don't get why internet experts think that the 7D mk II needs to be FF. It is preposterous, as FF and crop are two totally different tools, and crop is a better tool for nearly everything.
The 7D mk II will be a APS-C camera, the FF 7D 2, if you will is called the 1DX.
I agree that any 7D Mark II will be APS-C but to say that crop is better for nearly everything is wrong. It's not better for low-light and it's only good for reach and putting pixels on subject, when you are reach limited.
I hear a lot about how a FF/crop combo is the best for sports such as a 5D3/7D combo. While I agree it's convenient and useful, and ignoring price obviously, it would still be better to have a pair of 1Dx's with sufficient reach lenses. The 1Dx with the longer lens to make up for the 7D's crop factor will produce better IQ, at ALL ISO's. This is exactly why I ditched both of my 7D and 1D4 cameras in favor of a longer lens and another 1Dx. Again though, photography was helping fund a lot of that and had I been on my own, NO WAY I could have afforded that. So I agree with jrista and neuro regarding the cost factor regarding crop cameras. It really was the price difference between a 7D and 1D4 back in 2010 (even though technically the 1D4 is a "crop" camera).
With that being said, I really hope the 7D replacement is revolutionary and I think it will sell well and make a lot of people happy. I may consider it as a "3rd" camera if the specs are right and I have the funding.
It's a cost factor, it's a weight factor, it's a mobility factor... These together display the impressive usefulness of APS-C... Hence, why the mirrorless crowd is cheering on their cameras, and saying things like "I'm so glad I ditched my full frame cameras". I've read that in several blogs. Full frame is too heavy. Larger cameras have their place, but it's a dwindling niche, if the camera companies will release full pro quality crop cameras. They have been holding out, because they want to push everyone to upgrade to full frame when they are done with their rebels, it seems.