I remember reading there will be no 7D mk2 or a camera by that name. the newer body will be digi 6 which is far ahead of the game and also, the 70d was suppose to be the new 7D new version, so if there is a replacement maybe its out already and if there is a camera coming out I dont think it will have anything to do with a 7 at all. just my 2cents, only time will tell what it really going to be.
The 70D shares a lot of 7D specs, which really underlines my earlier point about the 7D being a very advanced camera when it was launched. I get the impression with the 70D, it was Canon cutting into the second hand sales of the 7D. The 7D is hardly selling anymore on the new market but is selling very well on the used market. Canon only recieve income with the same of new cameras, not used ones. So the way to fix this is release a nearly identical camera with a nearly identical spec, but built to a cheaper cost base and sell it for the same price as a used 7D....and this is exactly what the 70D seems to have done. The same it true of the 6D and 5DII.
Sure there are few minor upgrades and a few dumbed down specs, but generally this seems to have happened.
The Problem Canon seems to have with the 1DX and 7DII, is that the 1DX is still selling well and the second Canon release a 7DII, those sales will tail off pretty fast. It's just not possible to make a 7DII without it being a 1.6x version of the 1DX. The 5DIII is already a full frame 1DX lite....so a 7DII must therefore be a cropped sensor 1DX lite also. Ergo, simular frame rate, AF array and 18mp as the 1DX.