Worthplaying.com posted an article that reveals some more of the cars to make it to Need For Speed: Pro Street
2006 Audi RS4
2008 BMW M3
1995 Mazda RX-7
1999 Mitsubishi Eclipse
2006 Mitsubishi Lancer Evolution IX MR-edition
Nissan GT-R Proto
1970 Plymouth Hemi Cuda
1986 Toyota Corolla GTS AE86
2006 Volkswagen Golf GTI
You can read more here
We also have some new screenshots from yahoo games and also a video showing the new GT-R Proto. They also have a developer interview posted.
Also the online video game magazine CVG posted a preview for NFS Pro Street, you can read the whole preview here.
You can view the rest of the screenshots here as well as the full size images.