Porsche 928 Replacement, Under Cover?

What's this under wraps at the Porsche factory at Stuttgart? Judging from all those weird shapes propping up the tarp, Dutch site AutoGespot says it could be the 928 replacement reportedly set to arrive after the Panamera four-door coupe. It does have Porsche wheels, though it looks a bit unformed. Kind of like they just piled a bunch of parts up to mess with prying lenses. What say you, oh scrutinous ones?[AutoGespot]