The only real way that Canon is going to plug the hole left by the APS-H sensors for the wildlife and bird photographers who have used the 1D series cameras exclusively for the past 10 years is with a 1D Mark5. Another 7D ain't going to cut it or get much interest, at least with Canon's current sensor technology.
I love the 1d cameras, but the aps-h, was just weird, don't get me wrong, I love it, but it confused me.
Anybody with that money for a 1d, should have the money for a super telephoto.
With the 1dx, pros, get the quality from ff they deserve, and the higher fps, that means the will really need to put $$$ in for lenses. But a cheaper 7dii, will have similar features as the 1dx, ok iOS, ok fps, ok focus, just not as good, but they put an aps-c in there for those who love to shoot, but don't make lots of money off of it, or don't want to carry a super telephoto, or, if they're want to go really super-tele. Canon wants to reward the pros with good stuff, but keep the ameutures a step below, with the aps-h, there wasn't a great difference, and pros didn't get what the payed for, since there was a similar 7d gong for 1/4 the price