I'm still very hopeful, especially seeing this photo above.
If you look carefully, you'll see that it will have a flank that is similiar to the characteristic lines of the CLS.
So it most probably will have the sleek appearance of the CLS which most of us love but with a longer flank.
That will probably make this car. That and together with the wheelarches from the S-class which I think it'll look great on a large coupe.