my take --- what they will unveil in october will probably be a 1d style camera with a 1d style price, and similar to the 1dx this will be announced but not available till summer 2013. In the meantime, they will also unveil the tricle down too. If they are indeed not only bringing in a new sensor, but a new naming scheme, then it would make sense to have a body scaled to each price niche, so the XXDFDDXX will be aimed at high end pros and have a price tag of about 7-8k. Then they will have a lower end pro body in the 2.5-4.5k range, and eventually we'll see rebel style version in the $750-1500 range.
Think about last year, the 1dx wass announced early, but not seen for a long while. The mk3 was announced and on the market very quickly (which makes sense, most in the market for a 1dx probably needed about a year to allocate enough $$$ to snag one). My guess is we'll see something similar here.