The Chevy team seems to be all set for 2012:
http://kkuriren.se/sport/lokalsport/1.1282454 (in Swedish
)
It says that 2 drivers are signed, new engineers with F1 experience, the teams budget is in place and everything will be revealed very soon. No hints at all on drivers or cars.
Another bit of news in the article is that the Gothenburg City Race will be held as a night race.