This is actually my second drawing of the car (I am the professor of art), and the first drawing I did was the sketch of the current 5 series that I have posted on German car forum, but I have done it 6 months before the official reveal and as it happens it was almost 99% accurate (I have a gift of good visualization, I don't work for the BMW or have the access to latest BMW models
).
Anyway, the latest render is very similar to my drawing, but I think that the grill is too big and somewhat inaccurate in shape and the lights are based on 8 series lights.
Other than that I think the new BMW M4 will look very similar!