Well, if Canon sticks with their current (& much-appreciated) theme of not giving a toss about the megapixel race and trying to make the best cameras possible, I think a 7DII would look something like this:
- new backlit APS-C sensor bringing associated low-light performance improvements
- as few MP as they think they can get away with, I'd imagine somewhere between 16 & 18
- single digic 5+. plenty of processing power and keeps costs down & battery life up
- as many of the new features from the 5DIII that they can squeeze in - hopefully the reduced moiré video processing will reduce the need for a strong AA filter
- I'd imagine a bump in existing fps in order to placate those lamenting the loss of the 1D series. 9-10fps @16-18mp is likely possible with digic5+, and a 10fps APS-C mirror/shutter should be a walk in the park for them after having built the 1DX.
- this is just a wish, but improved viewfinder if possible (the current one is already 1.0x/100% but perhaps they could make it a little brighter/snappier...)
- under $US 2k
Look for an announcement either at Photokina or early 2013.
If they go with the backlit sensor or otherwise improve low-light performance by a stop or more, the 7DII could likely be viewed as the logical successor to the 1DIV.
I don't think we'll see a non-Ciné APS-H EOS DSLR again. It's pretty clear that Canon's APS-H fabrication unit has moved over to the Cinema EOS side of the house (brilliant move on Canon's part; APS-H is almost exactly the same size as Super 35 so repurposing the fabs shouldn't have taken much effort).
Here's a thought: what if one of the forthcoming "for mere mortals" Ciné cameras and the rumored mirrorless system are the same thing? There's an awful lot of synergy between the features of those two markets...