Honestly, I think I am most interested in the second, lower tier model predicted earlier (maybe with a removable EVF). I am certainly interested in a smaller camera body with a full frame sensor which can act as a backup to my 5D IV without taking up a lot of space. Really a full frame M6, and bonus if it can take an LP-E6N (yes, no doubt that would make it bigger than an M6).
A camera like that could make for an amazing back country camping landscape camera. Some slower/smaller but high quality native glass combined with full-frame low light performance in a small package would be very attractive (for me anyway). I might even go so far as to say that a non-EF mount which takes an adapter could be a good thing depending on the need. For instance, using a thin mount could allow for slow but small lenses allowing the user to really drop the minimum size of the kit, but adapting EF lenses to the body would allow the user to access big and fast glass on the same mount, but not have that extra flange distance built into each and every lens as it is in Sony lenses - instead you only have the adapter which takes up that flange distance, so your over all kit could end up being smaller, even with big/fast glass. I really doubt any of this will be a popular opinion here, but if you wanted a "small as possible" full frame kit, that could do it.