Well, whatever it is it will be a disappointment. If for no other reason than expectations are so high and so varied. I mean, this thing is going to cost $5k, even though it should only cost $2.5k, so it had better have so much DR that it doesn't even have to have any shutter speed settings. Just take a frame and get the exposure set in post, right? Total fail if it can't deliver. I'm being reasonable though, as I am already admitting that they either are too greedy or aren't smart enough to figure out an good way to select DOF in post, so they will need to include an aperture setting in the lens/body system. We'll have to wait at least two more generations for them to get that right and release a worthwhile system....sheesh this world is a tough one.
In this very thread there are folks who desire a mirrorless/compact system, a full sized MF sensor, and the ability to use 35mm lenses (which probably don't have a large enough image circle nor enough outer edge correction if they did). So this thing is doomed to a flame war like all the rest of the camera releases.