Galvatron starts to reunite all of the decepticons but he has to face off. The information of megatron’s escape came to ultra magnus’ attention so he decided to create a covert team. A fistful of decepticons: The Fallen has freed Megatron and rebuilt him into Galvatron. In season 4, Megatron and other Decepticons are in prison on Cybertron but the Fallen has awakened and he has rebuilt Megatron into Galvatron. In season 4, Megatron and other Decepticons are in prison on Cybertron but the Fallen has awakened and he has rebuilt Megatron into Galvatron.