Megatron reveals to Optimus that he obtained another Matrix of Leadership from the multiverse. Using the combined power of their Matrixes, Optimus and Megatron destroy Starscream for good. Following the battle, Megatron orders a ceasefire and that the Decepticons and Autobots will possess one half of Cybertron each.
When Bumblebee can't remember what his current mission on Earth is, Windblade repairs his memory chips, enabling him to rediscover his past adventures on Cybertron. When his memories are being repaired, Bumblebee gets a clue that will lead both him and Windblade to complete their mission and save their friends, unaware that Megatron sent his Decepticon assassins to hunt them down.
Transformers: Cyberverse - The End Of The Universe IV Synopsis and Schedule