I've got this news out of clips on YOUTUBE, so it's not confirmed.
-A Autobot group called 'the wreckers'.
-The ferrari 458 Italia is named Rush, according to a clip on YOUTUBE confirmed on M.bay's blog.
-Rollbar, a monstertruck.
This figures have taken a new alt-mode or look:
-Bumblebee transforms into a Datsun, and as Camaro he has a more sportive look.
-Skidz and Mudflap might be not in the movie, but ther are seen two little cars, having a black paint and racing stripes that have the same colors as the paint jobs of thier alt-modes in the ROTF movie
-Optimus gets a Trailer, just like his G1 counterpart.'Awesome!!!!'
-Ratchet has a new paint job, with a 'E3' logo on the side.
-Sideswipe seems to be a Cabrio in the new movie.