My aps-H prediction is ... they will put the next H sensor in the new 7D series or equilvelent. The 1D / 5D will be thier Full Frame bodies covering 2 different realms / genres of photography , then give the 7D a sensor upgrade from the 22mm (apsC) to the 27mm (apsH) - it makes sense if you think about it - why do away with something that can be used as a selling point for a new product - the H sensor is the edge the 7 series needs over the Rebels to hold the single digit name it has.
The problem with taking that direction would surely be though that it would hold back EF-S lens owners from upgrading.
If ASPH were kept on in some form after a 1D/1Ds merge then what about using it for a mirrorless? seems like it could be a good middle ground there offering superior quality to the NEX while not pushing size/price too far, espeically if it has lenses built for the sensor rather than FF.
Well , with the amount of Rebel models releasing now , the EF-S owners always have something nice to choose from - The T3 entry level , and the very nicely feature upgraded T3i for example -
I can even see them keeping the entry level at the same theory for photographers on a extreme budget , and then adding a little extra weather protection , and shutter durability to the upgraded models to give consumers the affordable workhorse for their EFS lenses.
1D , and 5D for FULL FRAME - - 7D , and maybe Mirrorless for aps-H - - - T3 , and T3i equiv for the aps-C - - - giving Canon 2 bodies per sensor . We'll see though
It someone has a 7D right now that that seems to single them out as a potential 7D mk2 buyer to me so I don't see the logic in scaring alot of them off hoping they'll buy a cheaper model.
For me a better way to make the 7D stand out would be to take the aspects that were originally marketed most strongly and improve them, better AF, better FPS, better video and better build. If the 1D is shifting to FF then Canon have to worry but less about damaging sales by shifting those aspects of the 7D closer to or level with it I'd say.