The Grand Finale of Transformers

Surrounded by the Combaticons, the Autobots fruitlessly attempts to convince them that they're being mind controlled. Brawl and his men arrive and take custody of the prisoners, who puzzle over the fact they previously broke the mind control over their new captor. As it turns out, Brawl is still free of the mind control, though he's surprised Optimus Prime's team has Megatron with them. They reach the Castle Top where Brawl frees the team, before leaving to tell the authorities that the prisoners "escaped". Once he's left, the team realizes Megatron has disappeared and immediately assumes the Decepticon is up to no good, but Megatron has just been deactivating the defenses for them. Everyone heads inside.
Back on Earth, Rodimus Prime and his team have survived the destruction of the warehouse thanks to Jazz’s Triage Shield, though the device fails shortly after they emerge from the rubble. They resume their search for the High Council forces — according to Jazz, the enemy are constructing a space bridge receiver near the Crown City coast. The team reaches the docks and start searching. Air Raid stumbles on half a shipping container, which turns out to be partially affected by a Light Bender. Air Raid breaks the device, revealing the council forces and their Space Bridge receiver, just in time for the rest of the team to arrive and engage the troopers in battle. Jazz covers the area with his Triage Shield to try to avoid humans detecting the conflict. Rodimus and Elita One take to the air, but are hit by missiles that send the pair hurtling towards the ground. Rodimus fortunately recovers in enough time to save Elita One.
The Autobots reaches the main council chamber where Onslaught is ordering Chromia to make another transmission. Wheelie detects Light Bender technology, so Ironhide deploys Ramhorn and Eject to investigate. Chromia begins her transmission about the impending invasion of Earth, but falters. Onslaught finishes the speech for her. Chromia’s protest that humans should control their own planet goes unheeded by Onslaught, who orders Windblade to signal the start of the invasion. Razorclaw yanks a device from Chromia’s leg, deactivating the Light Benders and revealing the High Council to be Combaticons. As the Combaticons attempt to capture the Mini-Cons to use as hostages, Sunstreaker notes that the camera is still broadcasting to the planet, but as the mind control is still in effect, the populace won't react. The team goes to try and deactivate the signal, and Optimus notices Megatron has disappeared. Onslaught blasts the two Mini-Cons and the Decepticons, minus Chromia, engage the Autobots in a melee. The Autobots succeed in taking them down one by one. Onslaught has the other 'Cons (Chromia, Windblade, First Aid, and Swindle) merge with him into Omega Bruticus, and the Autobots likewise merge into Optimus Maximus. As the two combiners battle, the fight is broadcast to the rest of Cybertron.
Rodimus’s team fights as the Space Bridge portal looms ominously overhead. Rodimus has the other Autobots draw the fire of the Autobot troopers while he flies in and pulls the main dish of the receiver free. He throws the dish directly into the portal, creating a feedback loop that causes the Space Bridge to explode.
Omega Bruticus spots the alarm from the portal's destruction and, enraged, starts pounding Optimus Maximus while outlining the various plans the Autobots have foiled. Wheelie finally locates the mind control transmitter, which Megatron promptly destroys. The population are freed from their stupor in time to see the broadcast of Omega Bruticus repeatedly punching Optimus Maximus and detailing his plans. His attempt to finish off optimus Maximus is put on pause when Chromia rebels, giving Optimus Maximus the chance to fight back. Omega Bruticus is defeated and splits into his component parts, as around Cybertron the Autobots cheer. The autobots splits as well and chromia expresses hope that both sides can work together instead of fighting.
Optimus and Rodimus’s teams stand before a crowd of cheering Autobots. Rodimus turns down the idea of leading the planet, and designates the rest of his team as a temporary council. Optimus’s team are keen to get back to Earth, and Rodimus suggests they be appointed ambassadors.
Sometime later on Earth, the autobots are back in the scrapyard. Sparkplug and spike, despite all the times they've been endangered by their adventures with the Autobots, happily welcome them to continue staying with them. Right on cue, the team immediately starts squabbling. They're interrupted by a distant growl from megatron, resulting in them revving up and rolling out.
'Til all are one.