If the new Supra isn't going to have a TOYOTA engine, what's the point? I might as well buy the BMW M320d station wagon with the most powerful diesel and manual transmission BMW produces and call it a day. Even if I bought an M3 with a manual and the V8, I'd still be ahead of the BMW Supra. Who comes up with this stuff?
This concept reminds me of the Ford Taurus SHO(0) with a DOHC Yamaha motor. Ford didn't make a DOHC 24-valve motor of its own yet.