IMO let the brand die. What did the Pontiac brand really stand for anyways? What unique models did they have that weren't twins of other GM brands?
They say the brand was supposed to be the "Sporty GM division" but all of the cars were just different styled versions of Cavaliers (sunfire), Buick Rendevous (aztek) , Malibu (grand am / G6), Holden Commodore (G8/GTO), toyota corolla wagon (Vibe), etc etc.
I'd argue that NONE of the model offerings were even remotely sporty & had no identity at all. The only model I think of as sporty (and a mistake that they discontinued) is the Firebird/Trans Am. The only thing they could've done that made any sense is to switch some of their Chevy models over to Pontiac branding (and styling) and REMOVE them from the Chevy line up so that pontiac has its own "sporty" unique model line up while chevy keeps its main-stream line up. Cadillac the luxury line up & GMC the truck line up. Buick, on the other hand, i don't see its identity either...even now? Its sorta upscale but not luxury....i don't understand what they are trying to do with that brand either.