The teaser image looks to me to be of a hardtop (see white roof at bottom of image). Of course, the teaser image isn't necessarily of the real thing being teased either.
The image in the teaser is the same car used in all of the other Motor-Tober ads. Nothing else going on.
Truck? An article popped up in my news feed about the guy who made an "el camini". This pic isn't it, but a quick image search produces a lot of examples.
If it's the Motor-Tober test drive, things are looking grim. I just brought my Clubman in for service today, and not only is the dealer lot almost empty, they have ZERO cars in the showroom. They do have some test drive vehicles, but this chip shortage is hurting supply. I feel bad for my dealer.