The two 1/144th scale Starscream jets (in both movie decos) have been posted up on the Tomy website (and mirrored at Seibertron), showing off the details and features (holographic pilot, in-scale Bumblebee car, light-up engines, and retractable landing gear & missiles?)
I think the Starscream is plastic, and the Bumblebee is Diecast (but I could be wrong).

These are expected to be released on Boxing day, and it looks like most online stores still have this available for pre-order.