We have a 5D II and a 7D, and although the 7D doesn't have the resolution or low light capability of the 5D II, its in camera speed is unmatched. The 5D II feels so sluggish after using the 7D. I am excited about a 7D II that would have 24mp sensor and still great speed. Even if it is far above the current 7D price point. It would never replace the 5 series to us, but the pair make for fantastic shoots. If the 7D II is for real, we will be looking to but both the new 7 and the 5D III this spring.
Realistically I'd think a 7D Mark II (not likely) or a 70D (more likely) would go behind the 5D Mark III, much like the 7D went behind the 5D Mark II in 2009, in level and price. A higher MP camera will go between the 1DX and 5D Mark III. I don't see APS-H on the horizon.