I would want a true canon competitor to the NEX line, specifically the NEX-7. The lens selection on the NEX is what is holding me back. Of course if Canon released a series of cameras for teh different niches like Sony did, that would be awesome (NEX-3, NEX-5, NEX-7, etc.)
Bottom line, if Canon makes a more pro mirrorless body, with an EF adapter option, and a decent selection of compact/small/pancake lenses, I'm all in
M