Yet another possibility is a rear-drive compact car replacing the current badge-engineered G5 under the G4 name. Speculation has this vehicle riding on the Kappa platform that underpins the Solstice and being available in both coupe and sedan models. GM has been mulling a second Kappa car for a while, and it sounds like it still is.
Last but not least, there has been talk of a Grand Prix replacement called the G8 that will be built on the Zeta platform. From what we hear this car will definitely appear at the Chicago Auto Show in February, if not sooner at the Detroit show in January Aren't rumors great?
[Source: GM Inside News]