There is NO WAY that Canon will decrease megapixel count. Megapixels can only go up, never down as that is difficult for marketing to overcome. They could only go down by creating a new camera on a different line for a special purpose. Otherwise, for MP to go down, the specs would have to be incredible. 1DX type specs. Canon isn't going to hand down the 1DX sensor and shutter to the 5D line. I don't remember a 2nd tier pro camera inheriting the previous generation flagship specs. The flagship models keep certain strengths for longer.
You mean like the a7s? Did that camera not make waves, even though its pixel count was way down over the original a7 cameras?
The A7S is a new line of camera. It isn't a successor to the A7 or A7R.
Although Canon did move from 21MP (1DsIII) to 18MP (1DX). So yes, maybe this is a 5DX that uses the 1DX's sensor?
Would have to be a completely new sensor design and manufacturing plant for it to have massive new DR. Maybe that will be Sony's involvement?
Also, no mention of DPAF...