These are just for fun - a way of imagining new body styles for the hugely popular new Chevy Impala sedan.
Yes, the Chevrolet SS with its big V8 and rear-drive does have a wagon variant abroad, as does the Buick Regal in the Opel Insignia Tourer.
But this front-drive, "affordable large car" has a great track record of success with American family car shoppers. These new parents are the most unusual in their buying habits: they generally want whatever type car they did not grow up riding around inside as a child themselves.
So as the full-frame SUV becomes the AWD crossover, there might be some appetite for a Station Wagon renaissance. A car large enough to pick up your whole family (plus luggage) at the train station.
These are extremely rough first-results from a quick rendering project, and are 100% speculative - as their quality likely indicates without saying.
I will say this: there were a couple of dead ringers for the BMW 535i GT as that roof angle changed...