[Erebor]

It is important for you guys to aknowledge, that this is not a vehicle in development, but a drive system. There will not be a gran coupe electric i4M.
It is an i4 M50 with G80 suspension components slapped on to it. It's a technology testmule.
Number of doors, or generally the design is irrelevant. All that matters, is the drive system beneath and the first car to carry that, will look completely different. Also, it is probably 4-6 years away.