Well, it seems the trend is to usually serve up the upscale/faster model after the launch of the car (except in the Challenger's case.) Since we now have a better idea (since there's no official confirmation from GM yet) of the numbers the cars will have, it seems GM should be able to offer up more, especially with the CTS-V and ZR1 cars already out there. I think this is just more confirmation the Z28 will reign supreme