The 5th Gen is probably going to be the heaviest Camaro ever... there's just no way around it. Cars keep getting heavier with every generation due to increasing safety standards that force engineers to add more bracing and more safety features... its just the way it is.
The real hope is that they keep the lb/hp ratio pretty low... 10lbs/hp is sort of the magic number for crazy performance. If they manage 3900lbs or less and 450hp then its 8.67lbs/hp which is awesome... very few cars can match that.
I bet the first SS or whatever V8 model is only about 400hp, and the car is around 4200lbs, which gets us to aroun 10.5lb/hp which ain't bad really.
If they did that, then the special edition could use the LS7 and make ~500hp and be a lot lighter for increased performance... THAT's the one I want. 500hp, and no option that doesn't make the car go/stop/turn faster!
LSx