4 series
As far as I know from car car magazines. All the wagons and sedans will remain 3 series. The coupes will become 4 series. As far as the next M3, I don't know if it will be an M4 or remain an M3. I've never seen that picture in any car magazines or car mag. websites. Its not even on BMWZINE, I just stumbled on it web surfing. Too bad BMW is not giving us any hints, but I guess it'll be a nice suprise. I hope!!!