Last February it was the T3i announced from "Lake Success, N.Y.". What are the odds we'll see a repeat of that announcement? Or is this rumor simply predicated on past Canon announcements?
Even if it is, there's been a new Rebel/xxxD in 1Q for the past several years, so another one seems likely. I agree that it will use the same sensor (a three-peat for that sensor in the xxxD line), but with Digic5, and possibly the 3.2" LCD in the 1D X - that will likely be sufficient differentiation for the marketing department to run with.
We're more likely to find a swing and swivel in the T4i/600/650 than the 1DX screen.