Here is my guess/wishlist
price: $2000 body only
10fps with about a 40-50 raw frame buffer
5d3 AF system
full weather sealing
dual pixel AF system from 70D
new sensor different from 70D (one stop better noise performance and one stop better DR)
possibly 4k video and 1080p/60p? One can hope.
- Price - probably not too far off (probably >£1700 in the UK)
fps - probably on the nail
raw buffer - unlikely, probably closer to 30-35 as the 1D only has 38
5DII AF - quite likely, cant's see why not as it is proven technolgy
weather sealing - probably
wifi - definitely, as cheap and commonly occurring now
70D DPAF - probably a similar solution but not same system due to (hopefully) new sensor
New sensor - absolutley needed, as 7D was revolutionary, so the 7D2 should be
ISO and DR - probably
4K - could be, as that wolud be revolutionary for the video people out there
Any AF chip designed for a FF camera won't work with a 1.6x mirror assembly - there simply isn't enough coverage for such a chip. Unless they make a 1.6x sensor body use a 1.0x mirror, with all the additional cost, speed implications and lack of compatibility with EF-S lenses that brings. No reason why a scaled down version can't be made for APS-C though.
Secondly, a whole stop of S/N ratio improvement is highly unlikely, unless we're talking about out of the camera jpegs after being cooked by an even more heavy handed DIGIC dose of NR? As far as I know, modern sensors are closing in on the theoretically optimum QE, so we no longer have the headroom to make such massive gains (the 70D would have to be below 50% QE with the 7D II close to perfect to get a doubling on that metric).
And wifi as yet hasn't been introduced on any all magnesium bodied DSLR's yet. No reason why the antenna can't be located behind one of the plastic flaps (ports, battery, flash, screen etc), but this is new ground, so no reason to assume wifi is a given.
Other than that, yes, the wish list looks nice