Hey, haven't seen this posted here before.
Concept artist working for Massive Black, posted these up on his blog back in February.
Features Sideswipe (corvette robot), Jetfire(SR-71), a "ball bearing robot", Soudwave attacking, and an "Insecticon Collective"!
Apparently if you have the 2 disc edition of ROTF you might have seen these?

http://wburtconcept.blogspot.com/201...of-fallen.html