This seems like a fun thread. I did actually come up with a story whilst playing around with my Transformers.

07 Movie Deluxe Jazz seems to be in a state of urgency, as he speeds up in the harsh deserts of Nevada. He finally arrives at the US Air Force Base, where there seems to be chaos at every corner. Jets, tanks and jeeps were effortlessly tossed in every direction, causing pits of flames to rise out of the builidngs, as the Autobots launched their assult on ROTF Voyager Starscream and his malicious henchmen. Aiding the Autobots in their attack were Setsuna F. Seiei, pilot of the Real Grade 00 Raiser, and Kamile Bidan, pilot of the Real Grade Zeta Gundam. Feeling the urge to help out his fellow comrades, Jazz joins the battle as he faces off against the fearsome Master Grade Sinanju, piloted by Full Frontal, a man seeking revenge against the Autobots as he believes that they were responsible for the deaths of his loved ones. The Sinanju gains the upper hand, as Jazz is tossed around, crashing into building to building; however, his spark still ignites with resilience. Unfortunatly, this isn't enough as Jazz is lying helpless on the ground. Before Full Frontal takes the finishing blow, he is suddenly attacked by a red and blue longnose semi truck with flames. The grill of the truck then splits itself. The front of the cab also splits apart as the truck seems to lift itself of the ground. The wheels collapse on what appears to be legs, while the sides of the cab rotate forward, forming hands and fingers in the process. Finally, a samurai shaped head pops out as the doors of the truck collapse onto the front windows. "About time you arrived", muttered Jazz as he tries to lift himself up. The truck now had the shape of a giant, red and blue robot. It was at that moment that Full Frontal knew that it was the one he was looking for all these years. His name, cherished by the Autobots, but despised by the Decepticons. He was indeed 07 Movie Leader Optimus Prime.