Bmw M page posted a picture on facebook with a covered car. The comment says 'things to come'.. So either the M3/4 or the M235i, it looks more like a coupe-style car. But I don't expect BMW to show a concept of the M4 before the M3?
http://www.facebook.com/photo.php?fb...count=7&ref=nf
Could be the M6 Zagato concept as well..