The 7D is one heck of a camera. It is loaded with features and is still "high-tech" even from today's standards. They would have to replace it with something that would make even the 5D3 stand up and take notice. I mean heck, they took the best of the 5D2 and the best of the 7D to make the 5D3!much depends on the future of Canon's participation in the premier wildlife (crop) body space. If they stay in it, then 7D2 will have to make the 1D4 take notice, I would say.
18MP cannot be where Canon levels the playing field, even if it is an "upgraded" sensor. If the new 7D2 is 18MP, I cannot imagine too many features added that would justity upgrading my current 7D. (Even if it shoots 10 FPS, or more and dual digic 5) Now, IF the 7D2 came with a 24, 30, or higher MP sensor (ASP-H, or ASP-C) sensor and shot 8 or 10 FPS, then I might consider it. Or if it came with a FF sensor, but I wouldn't trade it for a "lesser" MP sensor (14, 16, or otherwise) for the current 7's speed.
But -- consider that Canon just announced a new18mp (FF) camera, with a new sensor along with a boat load of featuers beyond the 7D. Moreover, today's 16MP 1D4 is still suprior to todays 7D in many respects
consider that you can purchase a 1D4 today, which exceeds these requirements.
Now that being said, if the 7D2 was 16MP FF and shot 10 FPS, then I may look into it. Video is not something I care about (or use) so I don't worry about what features or not it has with video.
My opinions are based on a possible "entry" level of a cheaper FF camera (that is also rumored to be 18MP) from Canon. They need bodies to fill different price ranges and features. A return of the 70D to the status it had before (I.E. 40D, 50D...) would make the placement of any 7D upgrade a difficult one for Canon.
Agreed that the 7D2 positioning will be interesting to watch, especially if 1.3x goes away. I don't see xxD line filing the premiere wildlife crop-of-some-sort market ,but 7D2 could do that if the timing with the 1D4 was carefully done. The 1D4 is aging, but still spanks the 7D (except for price!), so the 7D2 intro would have to leap frog the 1D4 in my opinion (even if a breakthrough in price per performance). Canon appears to be forcing the serious high-dollar wildlife guys into buying a lot of glass (move from crop to 1DX), so many would like to see 7D2 as the premiere crop body wildlife body -- including the possibility of 1.3x. I'm in that camp too.