I really don't think they will bring camaros or mustangs to the Busch series. Haven't heard anything about it... and they have a whole series JUST for racing Camaros, Mustangs, and other sports cars... So why would they want to race them in the Busch series? I'm glad they Busch series won't be using the stupid looking "Car of tomorrow" but I am highly doubtful that they will use Camaros.
Sorry to be a downer... but as a NASCAR fan, I seriously doubt it happening. They won't do anything logical or cool.