If GM was smart they would bring back the chevelle. Its a multi purpose vehicle, could even be its own brand like Bronco. It can be a super crazy HP SS coupe, a 4 door, a wagon, a truck etc. From mild to wild with one marketing budget. I'd get creative and go after subaru with the wagon, make it AWD and then sell an elcamino version. It would be a roaring success #fact

Ford would then copy them with a new Torino or Fairlane that did all the same stuff and Mopar would be stuck with a 4 door charger - they could get them into the ultimate headlock (devils advocate)