Transformers 2: The Coming of Unicron

Transformers 2: The Coming of Unicron is the sequel to the 2007 film Transformers. It features the return of the stars from the original.

Plot
After the battle in Los Angeles the autobots have been hiding on Earth.

They find out that five mechanical dinosaurs in Mexico. Sam Witwicki tells Optimus this. Optimus and Ironhide go to Mexico and bring them back and find Starscream with a new group of Decepticons there for an unknown reason. There is a battle, but Optimus and Ironhide are forced to flee on a ship provided by the United States that they took to get there.

Ratchet had been working on Jazz to see if he could repair him and eventually does. Everyone is happy Jazz is revived and Ratchet begins to work on the Dinobots to revive them from their coma. The Autobots Red Alert, Hot Rod, and Acree arrive on Earth. The find the others and Red Alert helps Ratchet with the Dinobots. Acree becomes Mikaela's motorcycle.

Meanwhile it is revealed that Starscream was in Mexico to get the Constructicons. A group of Decepticons sent by Megatron to destroy the Dinobots. Though they wree put into a coma when the meteor that wiped out he dinosaurs hit Earth.

Eventually the Decepticons attack New York City to draw out the Autobots. Eventually they are defeated by the Autobots, and are forced to flee.

Back at their base Thrust tells Starscream that he is unable to lead, and that they need to bring back Megatron. Using Galvatron (who changes into an aircraft carrier) they go out to see. They eventually pull Megatron out of the Ocean and revive him with a synthetic spark. Megatron is reborn and seeks revenge on Optimus Prime and the rest of the Autobots.

Sam begins having trouble with Mikaela when he meets Carly. Bumblebee also falls in love with Acree.

The Decepticons attack the Pentagon to wipe the U.S.A.'s military hardrive to cripple the U.S. military. The Autobots battle the Decepticons, and to their surprise see Megatron alive. Jazz sees him and attacks him in a blind rage for revenge for his death, though Megatron defeats him. Eventually Lazerbeak wipes the hardrive, and the Decepticons flee on their ship the Nemesis.

Back at the Autobot base Jazz is enraged and vows to kill Megatron no matter what. Optimus tries to help him but Jazz leaves to hunt down Megatron on his own.

Starscream has his own vendetta against Megatron for taking power from him again. He plans to betray him and take over the Decepticons once more. Meanwhile Thrust finds out that there is a high energy source heading towards Earth. Megatron sees the power reading and can't believe his eyes.