The sideskirts follow the E92 design. The front bumper takes inspiration from the 1M and is immediately recognizable as M. This brings us to the rear of the car where the taillights ditch the amber of the F32 4-Series (thankfully) and the car retains the quad exhaust setup the E46 M3 and E92 M3's brought us. Most importantly, the controversial 'bimmerrang' side vent received a redesign for the M version that looks much more like the E9X M setup. It just looks better.
The car is a solid design and looks great. Now the question becomes what the official specifications would be. A 450 horsepower S55 turbocharged inlnie-6 mated to a 7-speed dual clutch transmission is expected. If BMW can drop the weight significantly, that may be enough. We will have to wait and see.
Enjoy the pictures.