In their last big confrontation, the Decepticons have retreated to Cybertron and the Autobots have received signals from Cybertron of Autobot origin. They say that they were scattered on Cybertron, divided from each other. Optimus Prime leads his team of Autobots, and their human allies, to Cybertron so they can regroup with their friends and hopefully win the war. And with the rookies having ended their training, Prime believes they can accomplish it. But one of the Autobots' problems is that it's been 4 million years since they last lived here, so they don't know what to expect whether it's an old friend . . . or a new enemy. But their biggest situation is that Cybertron is controlled by Megatron and Impactor, meaning that they will hunt down the Autobots even if it takes them another 4 million years.
