I think the lastest rumor was that S650 is going to CD6 platform. If that's true I doubt there will be a huge weigth saving since the car would grow biggerI’m not a rumor person. Could we see a lighter steel or aluminum body? Could a hybrid and electric bring AWD? I’ve heard rumors from decently reputable people the S650 will be 200-300lbs lighter than current model in gas only form, or at least one variation of the car will be light weighted. Weight savings for hybrids and EVs would be negated by batteries.
But I also heard that S650 could stay on the same platform as S550, which would also mean no huge weigth savings.