The ATS needs to be so good that potential buyers go "Wow! That's the best looking, best performing car I've ever seen."
Can Cadillac do it? I don't know, and based on their past history, I am doubtful. Here is my take on such a car:
ATS - 4 cylinder turbo, 10 mile battery, leather optional, awd optional, advanced infotainment including navigation, great style for $29,995.
ATS -4 - awd 3.6 V6, 6 speed auto and dsg, leather seating, advanced infotainment, coupe and convertible, for $35,000.
ATS-V - rwd 5.5L di LS V8, producing 450 hp, leather infotainment, super brakes, FE3 suspension, coupe and convertible, loaded for $40,000.
With those features and those prices, throwing in a long warranty, people would go, Wow, I gotta have one.
As Cadillac then struggles to produce to demand, the market sets what the ultimate price is to be. My guess is a $5-10,000 dealer mark up, with Cadillac then pricing the car higher to keep the adp for themselves.