What's that intriguing shape poking out from underneath the curtain? Rimac Automobili assures us all via its Facebook account that there's a Concept_One in there -- or, at least, a "one-off car based [on it]," marking the delivery of the company's much discussed and sometimes questioned 1,088 horsepower electric supercar. So, why the secrecy? According to the company's namesake executive, Mate Rimac, "the customer wished to control what will be published about the project." Hopefully the wind will blow away that curtain soon enough.