the turbo version is a go from what I understand
The Astra replaces the Ion, which should get a Redline variant.
The G5, no word yet if that is going to survive the redesign or not, if it does, it may get a GXP model.
Appearantly it seems that Chevy and Saturn are slowly becomming Opel/Vauxhall
Pontiac is developing into Holden.