Either way 2015 is gonna be interesting. It's speculated that the 6th gen Camaro will be built on a much smaller RWD platform, possibly the same one as the ATS which weighs 3300-3400 lbs in sedan form. It's a safe bet they'll use a version of the LT1 for the SS model too.
It is gonna be built on the ATS chassis which has received rave reviews and has beaten BMW at their own game of chassis feel, cohesiveness, and steering response. If the luxury ATS comes in at 3400lbs, I think the new camaro's will be just as light if not lighter. A 3400lb Camaro SS with a LT1 making 450hp will be a potent car.