What is the third part of Transformers?

In the first film, Megatron came to Earth to look for the Rubik's Cube. He wants to turn the machines on earth into his subordinates through the Rubik's Cube, and then he goes back to rebuild and rule Cybertron. Autobots realized that this would bring great disaster to people on the earth (considering that there are no machines on the earth, people will return to primitive society and be destroyed by fanatics), so autobots came forward to stop Megatron, and finally ended up with the death of Megatron and the destruction of the Rubik's Cube.

In the second part, Megatron's boss came forward to save Megatron with incomplete pieces of squares, and then they wanted to find the energy matrix to start the big machine in the pyramid to destroy the sun and bring the energy of the sun back to Cybertron to rebuild and rule it (the intention has not changed, but as for how to bring the energy back, Sentinel Prime will be found in the third part). Once again, the autobots realized that the earth people were facing disaster (without the sun, it would definitely be finished), so they stepped forward again to stop it. Optimus Prime was killed in the battle, but Sam took the lead in finding the energy matrix and used it to save Optimus Prime. Finally, the big machine in the pyramid was destroyed. The protagonist is not dead this time (the fallen king is not the protagonist, but actually a soy sauce maker). As for the plot in which the cubic energy reaches Sam's brain, it is purely a soy sauce for little Sam.

In the third film, Megatron still wants to rebuild and rule Cybertron, but they can't do anything about it, so they think of Sentinel Prime decades ago. Sentinel Prime can pull Cybertron to the earth's side, and then directly grasp the earthlings to work (this is the most embarrassing attention), but they can't activate Sentinel Prime, so they give this important task to the Autobots. The solution is to guide the Autobots to start Sentinel Prime through a few earthlings who have long cooperated with the Decepticons (Zhuzi's brother is really stupid). As a result, the Autobots activated Sentinel Prime and soon discovered that he was a "bad guy", so they started over. But this time, the Decepticons were outnumbered, and the powerful Sentinel Prime took control. The autobots were defeated, almost completely annihilated. Finally, they were attacked by the heroine and killed Megatron and Sentinel Prime. Transformers III.

Actually, the story is very coherent. In some places, the expression of the film may be a bit stiff, so it doesn't matter, because it was supposed to give the audience a shocking audio-visual experience, but the narrative of the plot is secondary.

Let's talk about the main characters first:

Decepticons @ Megatron: The persistent villain has only one purpose, to rebuild and rule Cybertron. Anyone who tries to stop him will die. In fact, if the fallen king finally succeeds in the second film, he will be killed by Megatron, but Zhu Ge finally did it for him.

Decepticons @ Fallen King Kong: Megatron's mentor knows many things and takes Megatron as a puppet. The plan was that Emperor Megatron would be behind the scenes after Cybertron's reconstruction, but the wishful thinking was wrong.

Autobot @ Optimus Prime: A typical justice faction, regardless of life and death, wants to uphold justice. It would rather never rebuild its homeland and protect the people on earth. It is fearless, but it can only be a hero, but never a leader, because it does not put the interests of its own group first, but the interests of the third-party earth people first.

Autobots @ Sentinel Prime: The real ruler, in fact, he didn't really betray the autobots. As he said, he just reached an agreement with the Decepticons. Originally, he was going to bring the energy column to send the energy after destroying the sun back to Cybertron, but it crashed. In the end, he had no choice but to pull Cybertron over. His only idea is to rebuild Cybertron at all costs. He just sacrificed the interests of mankind. He has a real one.