To say the truth, i highly doubt that the 7D will get an APS-H, with that step Canon would bring two situations with that.
With crop-lenses (EF-S), you can only use it with reduce megapixels
With Full-Frame lenses, you dont have the full focal-lengh, there is always the crop-factor.
Sou you have the disadvantage of a smaller sensor on full-frame lenses and you have the disadvantage of the reduced MP with a crop-lense (without any advantage like better noise-handling. You just loose parts of your sensor).
Also Canons flagship would be the 60D again until 70D is released. You can not compare the 7D view-finder with the 60D view-finder and i doubt that the 70D view-finder and features will _that_ better to be the new 7D.
So Nikon takes the lead in the APS-C section with the D7000 and Sony with its Alpha 77 is close after it.
Where would Canon be? An 7D with an DIGIC5 Sensor is exactly what Canon needs in the APS-C Sector, using an APS-H sensor wouldnt be that clever at all.
Also it seems like canon dont want to use the APS-H anymore, at least the choise of merging the 1D and 1Ds look like that for me.