To better visualize how the new M3 will look like with all the colors.
Why do I think it would look like this? The E90 M3 Sedan has the M3 Coupe's front clip... this one will retain F30 Sedan's general headlight and grille design with a front clip not too dissimilar to the M5.
The Coupe F32 will be the 4-Series which will produce an F82 M4 Coupe and that should have a different front and rear end design as compared to the M3 Sedan.
The Skirts in the spyshots is from the regular F30 sedan with bolted on wide fenders... the ones in this render should be how it might actually end up looking like.
Melborne Red
Singapore Grey
Black Sapphire
Carbon Black
Havana
Estoril Blue II