IDK about cts's, they are awfully expensive compared with the chargers and mustangs so they are kinda out of place. Id say you'd see some G8's, Chargers, Mustangs. Its just hard today given the lack of rear wheel drive vehicles.
I'll bet the Chevy police cars they're planning to import (basically a G8 in Chevy clothes) would become even hotter property. I'd like to see someone try a Mercury Grand Marquis and look at what made a Marauder a Marauder.
Hyundai Genesis Coupe? Heresy some might say, but it's rear-drive now.