It is. But with a new name. It's not the new Sclass fighter
GM won't have a true S Class fighter for decades. They might try to make one but people that can afford flagship cars right now equate them with German (and in some cases Italian). It will take a generation for Americans to accept and embrace a domestic flagship car with wreath on it for anything even approaching the price of it's German equivalent.
It will happen, just not any time soon. Jaguar is a good example of my opinion on this. They made crap and they lost everyone but their base. Now they're making really nice cars. The XJ isn't quite up to snuff as far as it's interior goes but it's an amazing car and journalists (@%1;?) all pretty much agree it's the sportiest, best driving flagship. Yet out here in LA: nothing. Nada. Nobody buys them because Jaguar has a well earned reputation for building stagnant crap for a long time and people spending that kind of money don't want to be seen in an ok car. They want to be seen in the best. It's very much vanity.
It works in reverse too. Cadillac built garbage for awhile but people associated them with being the best so they gladly bought shit and everyone was impressed with their shit. BMW and Mercedes could come out with shitty new flagships tomorrow and the next day there'd be 20,000 of them clogging my neighborhood.
I think they're on the right track. It's an endurance race though, not a sprint.