Really hope the new tracks will be good ones. I'm betting on at least some to be returns of previous tracks in the game, (SS11, Hong Kong, Midland, etc.) and maybe Valencia as it was included on PSP version of GT.
As for the cars, I really hope that there will be a lot of the count of new cars actually being new cars. While premium versions of the LP400 and others are welcome, stop me if you've heard this before, give me my damn Boss 302!