I think he designed it as a homage to the old Z3M coupe/shooting brake.
but yeah they definitely took parts from the M2. I’m guessing the front fenders and bumpers (including the headlights). It was already a 3 door hatch so they didn’t change the rest of the body work too much. I reckon the door might be from the M2 to match the lines/bulge of the front fenders. The rear fenders seem to be different from the regular 1 hatch as well. Don’t know how they modified it from the M2 donor car. You could see the rear quarter panel standing alone in one of the photos. The rear bumper has the