I think they've definitely left the door open for another FF body to replace the 5D2. And it'll have to be different enough to be compelling.
Give it a price tag around $2500-2700,
single Digic 5,
3 to 4 fps at full res of...
kitted with new, lower cost 24-105 IS zoom they patented last year.
Take some nice features off the 7D/5D3 but hobble it with another low-end AF system, maybe as good as the 7D's at best. Will make a great studio cam and will be able to do basic HD video with good IQ. Maybe 720p at 60fps.
Could work as a landscaper IF they can get past the pattern noise and bump the Dynamic Range up to better than the 5D3 - good luck with that if they stick with the tech they're using now.
It'll be a below-the-belt blow to the D800 and maybe help satiate those of us heavily into Canon gear and thinking of moving over to the camera with the little red slash on its handgrip.
I'll be watching for it, patient and hopeful but with a pessimistic attitude born of continual disappointment.