Well, I still think it|s a new 1D series body. Check out the similarities:
D3/D3s - Full frame, high speed(9fps), high ISO, 12mp, pro body
D3x - full frame, low speed, low ISO, 24mp, pro body
In similar, Canons new line might be:
1DV - full frame, high speed (12fps), high ISO, 18mp, pro body
1DVs (or whatever it will be called) - full frame, low speed, high iso, 36mp, pro body
What I'm trying to say here, is that Nikons D3x is their counterpart of Canons 1Ds. If Nikon found a market for a 1Ds-like camera, I guess Canon won't leave this market to them. I don't think we see an amalgamation of the two 1D-cameras, but only that the 1D V is a full frame one.