BMW revealed a darkened picture of its Geneva auto show concept on its Instagram page on Wednesday. It’s in a sweet shade of seafoam green and looks a lot like an Aston Martin Rapide. We’re guessing it’s a variant of the new 8-Series, possibly the M8 or what might become the 8-Series Gran Coupe. We don’t have much to go on.

If it is an 8-Series, we know it’ll get coupe, convertible and M variants. In September, rumors were swirling of a four-door version. It will replace the 6-Series, which never sold particularly well, and it’ll probably go live for the 2019 model year. A 4.4-liter twin-turbo V8 is probable, as well as a hybrid. If the 7-Series can do it, why not the 8? We’ll get more details in a week when we have boots on the ground in Switzerland.