I think GM has to be very careful about markups. People looking at this Camaro will be cross shopping it with the Mustang, which is competitively priced. Mark the price up too much in the beginning and only the Chevy die hards with deep pockets will buy it, which won't make the car profitable.
We have to be practical. The only recent precedence we have for high mark ups on muscle cars is the current Mustang when it first came out and the Shelby GT500. And the only reason those cars were marked up is because Ford has no competition, being the only muscle cars on the market. With Camaro and Challenger coming into the picture, there will be competition. And competition logically has downward pressure on prices. We may not be gouged as bad as we think.