Transformers: Revenge of the Fallen (2009 )

After the events of the first film, a new, more powerful entity endangers life on Earth: Unicron, the Devourer of Worlds. Unicron is a planet-sized Transformer with unlimited powers who feeds on other planets to survive. Unicron turns the corpse of the deceased Megatron and recreates him as his herald, Galvatron, who now possesses unlimited cosmic powers. This angers Starscream, who took over as the leader of the Decepticons after Megatron's death. Now, Sam, Mikaela and the Autobots must find the only thing that can stop Unicron: the Autobot Matrix of Leadership.