Like their partners at Citroen, Peugeot has a thing for dutifully disguising their prototypes from the peering lenses of our spy photographers. This moving glob of black plastic and rubber is supposed to be the upcoming 508 that is slated to replace the 407 and 607.
Other than that, we can't really tell you what to look for. Peugeot's recent design language has been anything but predictable. Just compare the automaker's Prologue and SR1 Hybrid Concept to get a gist of what we mean.