Unicron returns in the series finale movie "". When Optimus Prime restores the spirit of Primus, Unicron senses it and reawakens, this time in energy form. He confronts Megatron, saying that because of the Dark Energon within him, Megatron cannot become one with the AllSpark. Therefore, he will become Unicron's vessel, and serve him in order to destroy Cybertron. Unicron brings Megatron back to life and upgrades his form, using it to travel through hyperspace toward Cybertron. Upon arriving, he confronts Bumblebee, Arcee, Bulkhead, and Smokescreen, nearly killing them using his Dark Energon weapons. Megatron starts to question Unicron's motives of destroying Cybertron, but Unicron psychically tortures him to keep him at bay. After their escape, Unicron comes across Predaking, who, upon recognizing Megatron's body, viciously attacks Unicron in beast mode. Unicron proves to be stronger than Predaking and knocks him unconscious. He reads his mind, finding that Predacon remains will make a perfect legion for his destruction of Cybertron and Primus.