Transformers 6 : Rise of the Uncreator

Transformers 6
Synopsis
Following the events of the last film, Earth is devastated by a Quintesson invasion and the Autobots led by Ultra Magnus have gone into hiding. Optimus Prime has been brainwashed into becoming Nemesis Prime who killed Bumblebee. The Decepticons ally with the Quintessons to rebuild Cybertron. However Quintessa has other plans, she has Inquirata build a Time Window to change the past so that Autobots and Decepticons never existed so that she can have a blank slate to create the perfect Cybertronian civilization. The Autobots must hijack the Time Window before it can unravel the very fabric of space-time. Doing so, they enlist the aid of the Knights of Cybertron who have been brought to the present due to a rip in reality to battle the Quintessons. Ultra Magnus also goes to New Quintessa with the Aerialbots to retrieve the Matrix of Leadership so that Optimus Prime can be restored. In the meantime, Quintessa's planetary superweapon, the Uncreator, goes out of control and declares itself to be Unicron. Unicron ravages New Quintessa and sets out to devour Earth and Cybertron. Quintessa sees the error of her ways and orders the Quintessons to retreat from Earth. The Autobots and Decepticons end their feud and team up to destroy Unicron, using the Time Window to go back in time before the Quintessons attack Earth with Nemesis Prime. Quintessa rebuilds several dead Autobots from previous films like Jazz, Ironhide, Arcee and Ratchet to participate in the final battle against Unicron's zombie minions on Earth. Nemesis Prime is reverted to Optimus Prime when a returning Sam Witwicky along with Cade Yeager deliver the Matrix back to him, and a remorseful Optimus flies off directly to Unicron where he unleashes the power of the Matrix of Leadership to destroy Unicron, sacrificing himself in the process. Earth is saved from Unicron, and the Omega Lock is used to restore Cybertron. The Great War ends with the Autobots and Decepticons departing Earth for good and dividing control of Cybertron which enters a new golden age of peace and prosperity.