Transformers: The Headmasters bot Headmasters, led by Cerebros return to their home planet to aid in its defense. The situation soon gets worse when it is revealed that Vector Sigma, the super-computer at the planet's heart, was destabilizing, and Optimus Prime again sacrifices his life to save Cybertron. This soon proves to be only delaying the inevitable, however, when a bomb attack instigated by Scorponok turns Cybertron into a burnt-out, inhospitable husk. Rodimus Prime departs to search for a new planet for the Transformers to live on, leaving Cerebros in command, operating from the planet Athenia. Meanwhile, Scorponok replaces Galvatron - who had
Transformers: Dark of the Moon team, Bay and the team spent nine months developing a more portable 3-D camera that could be brought into location. In a hidden extra for the Blu-ray version of "Revenge of the Fallen", Bay expressed his intention to make "Transformers 3" not necessarily larger than "Revenge of the Fallen", but instead deeper into the mythology, to give it more character development, and to make it darker and more emotional. Unicron is briefly shown in a secret "Transformers 3" preview feature in the "Revenge of the Fallen" Blu-ray disc. Ultimately, the producers decided to forgo a plot involving the planet-eating Transformer,