Bad News: The Sigma platform they were thinking of basing it on is going to be full time with Caddy and Vettes!! This would entail building and upgrading of older plants to make Sigma platforms for a new f-body car! NOT!!!
Other option is to base it on the Pontiac Soltice platform.
Page 22, for those interested..
As I understand it the Cadillac CTS and an X5 wannabe are slated for the Sigma platform and will be built at a brand new plant in Michigan and the C6 and Cadillac XLR have a platform of their own and are being built at the expanded plant in Bowling Green.
On a different note I read somewhere that the Bel-Air Concept was built on a truck platform.
but solstice was on a differnt platform, I think it was one of the european platforms...
Sigma is still the most likely platform for 5th Camaro.