And a 500hp LS7 for the Z28? From a performance standpoint, why would I be against this? But from a marketing standpoint, it just sounds like yet another case of GM competing with themselves. It will probably be just like a Z06, except with slightly worse everything (except price, of course).
I'll wait for the official details to come from Detroit before I make a true judgement, but it should be interesting to see what other engines Chevrolet will offer with the new Camaro; a new muscle car war would be interesting (albeit oddly timed with high gas prices).