Canon's high MP / high DR body does not have to be insanely expensive. Just cripple the FPS, give it 16 point AF and native ISO up to 12800. It won't touch the 5D3 sales, nor the 1DX.
This camera is ment to compete with the D800 / D800E, and therefore the price tag should not exceed 4K.
But then again, it is Canon we are talking about here. The camera will probably be overpriced.
Don't talk about or mention the word "Cripple", I think Canon has been a doing too much of that lately. We don't want to give them any more bad ideas or make them think we're OK with it. They just need to try and give us the best camera they can. I'm sure the overpriced 5D Mark III is going to more than pay for the R&D they put into that AF. Now they just need to put it in every body they can (within reason).
Canon 1DX, Canon 5D Mark III, EF 85mm F1.2L II USM, EF 100mm F2.8L IS USM Macro, EF 16-35mm F2.8L II USM, EF 24-70mm F2.8L II USM, EF 70-200mm F2.8L IS II USM, 600EX-RT Speedlites, Profoto Studio Strobes, and a whole lot of boat load of light modifiers.