Just stumbled across this article on Car and Driver's website from this past June with a Pontiac communications director giving insight on a possible future muscle car for Pontiac...
Although it’s still unconfirmed at this point, Pontiac is pretty much guaranteed to get at least one muscle car from the prolific rear-drive Zeta platform (officially, Global Rear Wheel Drive Architecture) by 2010.
Full story:
http://www.caranddriver.com/carnews/...rd-or-gto.html