Starting work on this baby, It's basically Energon Optimus on the taco bell diet to become Ultra Magnus, a more classic version IMO. His arms that just stick up in the air will connect to the trailer. Yes indeed, he will have a trailer, and yes, he will combine with it. Current progress- 5/23/10-Primer on Magnus core bot, trailer transformation being worked on 5/1/10-Baseof white applies, head begins with paint, trailer destroyed,legs begin 4/10/10- Gotone of the reaer wheel segments in place, created peg hole, removed front mudguards. 4/7/10: Removed rear battery box, created MOCup of lower legs. He still has full knee articulation, and the lower leg wheel plates will be removable in order to combine with the trailer.