Megatron attempts to enact a Cybertronian prophecy that states a perpetual conflict will end on a world forged from chaos. While the planet in the prophecy was long thought to be Cybertron, the Autobots come to the realisation that the planet is Earth. In their pursuit of Megatron, the Autobots discover the source of Dark Energon and it will shake the world to its very core.
Transformers: Prime (Season 1, Volume 5) - One Shall Fall, One Shall Rise
The Season One Finale