Transformers: Prime Wars Trilogy

Optimus Prime, no longer the Autobot leader, travels the desolate wastes of Cybertron. Surveying the destruction, he remembers how the Transformers' millennia-long war finally came to an end... As the Combiner Wars began, Optimus was struck by the increasing devastation caused by the battle between Autobot and Decepticon, and came to fear that the planet itself could become the ultimate casualty. Seeking to put an end to the conflict once and for all, the Autobot leader arranged a final duel between himself and Megatron, their troops able only to look on. After a furious battle, Optimus Prime stood triumphant over his nemesis, and a weakened Megatron goaded him to strike the fatal blow. Prime raised his blaster and...... Above Cybertron, a mysterious piece of technology is in orbit, waiting...