I think this would be a game changer IF it comes in under $2.5k.
It almost certainly will not be that cheap. I'd expect a camera that's billed as a 'mini 1D X' to be priced in the $3500-$4000 range.
That sounds about right on the price. Although it really depends on features. If it has new sensor tech that is very impressive, I could see it coming in over $4k. Rehash of the same sensor technology, but with 1DX AF system, great weather sealing, maybe 24 MP, then ~$3k.
From a structure standpoint it would put the 5DIII and the 7DII beneath the 1Dx at about the same price point with the 5DIII being FF aimed at event and portrait photographers and the 7DII being aimed at sport/wildlife photographers.
Ooops. Quite a price. Will be intresting how much high ISO improvement in IQ there will be in such a crop body compared to a 5D/6D