A lot of discussion has been going on lately, mostly about the rear end of the panamera....I posted this picture earlier but I refined it a little more...\
I guess this becomes pretty close...soon we will know
I have to say your Photoshop honestly looks good to me. I'm just bored to death by normal sedans. The Panamera will look different and interesting without being too flashy. I'm looking forward to seeing the real product.