When Mini launched the Countryman in 2010, it emerged as the brand's first all-wheel-drive model. Now there's a new Countryman on the way, and it's also set to mark a Mini first by incorporating not just a mild hybrid system, but a plug-in hybrid powertrain. And that's just what we're looking at here.How do we know this prototype is packing a hybrid powertrain, you ask? A fair question, and we'll tell you: because the manufacturer chose to mark "Hybrid Test Vehicle" on the door. And because parent company BMW is already known to be working on a PHEV system for the 2 Series Active Tourer on which the new Mini crossover will be based, it's fairly safe to say it won't be developing a separate system for the Countryman.Expect the hybrid mega-Mini to combine a 1.5-liter inline-three driving 136 horsepower to the front wheels, and an electric motor good for another 102 hp on the rear wheels for through-the-road all-wheel drive and a combined output of nearly 240 hp. That's more than even the John Cooper Works performance model has offered.Scope out the spy shots in the gallery above, where you'll also find an interior shot of a conventional next-gen Countryman.