From the battle for the Planet Keys come two new combatants: Galvatron and Optimus Prime! Galvatron, formerly Megatron, has been powered-up and returns here to do battle with the Autobots! This Decepticon leader can transform to car to jet to robot and back again, and includes numerous weapons, accessories, and a cyber planet key.
Optimus Prime is a leader in the best sense of the word, taking point on every mission and never sending his team into any situation he wouldn't go himself. Dedicated to the protection of all life and the preservation of freedom for all sentient beings, he serves as a role model for his fellow Autobots. It is through his keen intelligence, even hand, steady nerves and endless compassion that the Autobots continue to fustrate the Decepticons evil plans again and again.
In a desparate race against time, Optimus Prime has been forced to send teams of his best soldiers into unknown parts of the Universe in search of the lost planet keys, ancient artifacts with the power to save Cybertron and the rest of the Universe from the giant black hole formed from the implosion of Unicron.
The rage Megatron feeds after his defeat by Metroplex activates the dormant power within his Unicron armor. This vast energy draws power directly from the Giant Planet itself, feeding it into Megatron and changing him into the mighty Galvatron! A living engine of destruction, Galvatron lives only to conquer all and grind the Universe beneath his armored heel. His weapons and intellect super-charged by the living energy of the Giant Planet, there are none powerful enough to stand in his way!