Here's what I'm hoping for... 505+ hp Z -- 600 hp SS.
To the best of my knowledge, in the past GM has kept the Camaro & Trans Am's up to par with it's line of high-end Caddy's (HP wise). For example, Cadillac's NorthStar engine having 300 hp while regular z28's, firehawks & ss's have had 300+.
Maybe it'll never happen but I'm hoping that with Cadillacs involvement, the SS Camaro will get a high-end upgrade. Even if it's a Limited Edition like what Ford's doing with the Shelby GT500.