For those asking for full frame it's not happening any time soon and if it does than I'd expect a minimum of 3499 and a non EF mount due to the flange distance is not suitable for anything remotely compact. I'm sure an EF adapter would be possible but pretty much the best you are looking at is Leica M9 @ $4000 with autofocus and a new lens lineup that is not EF compatible and at canon L prices.
I'd much rather see something comparative with the fuji xe-1 which has pretty much the best aps-c sensor
Good AF, good lens lineup size, great control scheme and awesome styling
What are they waiting for? I DO NOT wish to mount my EF 24-70 or 70-200 on that tiny thing - what's is the point buying mirrorless
Then my comment does not apply to you. I have seen way too many comments on this board wishing for a cheap EF mount compatible mirrorless FF. That is simply not going to happen. I've seen tons of people hoping for EF compatibility when IMO it is not a big selling point.
The reason the Canon EOS-M is not great is not because it lacks a FF sensor.
Poor AF, Poor ergonomics / styling, lack of built in flash and a sensor that is a generation or two behind the NEX or Fuji X are the problem right now