It's hard to get excited about something that hasn't been announced yet. Anything said here is 100% speculation as to what it might be. Until such time that Canon decides to release a 7D replacement, my current 7 is doing one hell of a job getting the action wildlife photographs I want and more.
That being said, ANY 7D replacement would have to be one hell of a camera to make me want to upgrade, I mean at 8fps @ 18mp is really nothing to complain about, especially for as low as you can get the 7D body now.
I have shot with 5D2's, 5D3's, 50D's 40D's... etc... and the 7D is a very hard camera to beat in terms of speed. As a wildlife photographer, my needs are different than someone who shoots a lot of stills, where a FF camera would be ideal. I love the crop factor and the 8fps are brutal in capturing what I want.
Are there faster cameras out there? Yup, 2 come to mind, the 1DX ($6799.99) and the 1D4 (used, about $3400.00), both of which still command a hefty price tag. 7D's are cheap if you get one on sale, even better if you get a refurbished unit from Canon.
When I can get a new 7D for $1500.00 now or wait for an even better sale (I've seen them as low as $1300.00 new), spending $3400.00 for a 5D3 or $3600.00 for a 1D4 or even 7 grand for the 1DX, it doesn't add up. Again, if you need (or just really want) a FF (I.E 1DX), then go for it, who am I to tell you not to?
The 7 works for me and is a very capable camera. Again, it's just hard to get worked up over something that hasn't even been announced yet.
My worthless 2 cents.
D