I have to second the question about them living in the past and why they haven't tried something new. It's a bit worrisome.
I'm a generation too late for the original Scat pack but I grew up around guys in my family who were knee-deep in the golden age of the Muscle Cars. The constant exposure to classics at car shows, the '67 GTX out in the driveway, the trips to the drag strip all made a big enough impression on me that these are the cars that most interest me... but I'm in the minority! Most folks my age have little interest in muscle cars and most guys younger than me couldn't pick a Buick GS out of a lineup, let alone have any nostalgia for the Rapid Tranisit System or the Scat Pack.
So for the most part, they're marketing to Babyboomers and the handful of us who appeciate these cars. That's a small demographic.
How much longer will Babyboomers be buying performance cars? :(
I think the concept of the "muscle car" still has legs- "big engine in a cheap car." With the right marketing, these cars may have a future. As much as I love to see it...I'm just not sure that reviving a marketing campaign from 40 years ago is a long term strategy.