Quad-Pixel Af, 8K and global shutter in one and same camera? I find that very hard to believe.
An earlier rumour talked about a 21MPixel sensor/camera with global shutter. I find that much more likely.
I'm with you on resolution. Its not going to be 8K/40+MP but more likely close to the current 1Dx series (20-24-28MP). And I doubt it will be released before the Olympics. There might be some in testing there though.