Warning: The below article may include SPOILERS and info that have served plot, twists etc in the Transformers Universe(Movies and Cartoons).
Note: Transformer Universe is one twisted universe when you take a deep look into it. A lot of individual(Transformers) have been an Autobot and later switched to Decepticon and vice-versa.
As the name suggest a transformer who transforms into a car. He is an autobot for the most part and an skilled driver with slick moves.
Hailed as the fastest Autobot on land, he has attitude as cool as ice. His motto "Stand up, keep fighting!" explains it all.
An autobot and original partner of Optimus Prime,the leader of the autobots. In short if Optimus ever needs a best man, its Ultra Magnus.
The planet eating,universe consuming Transformer is neither Autobot nor Decepticon, he's pure evil. And you have absolutely no idea why I want to see him in the next Transformer movie. Its because of the fellow below.
Primus is the "benevolent" godlike entity among the Transformers who is a rival of the the Unicron. Primus is the being, who created the Transformers to help him defeat Unicron. To put it bluntly, he's the Grand-Daddy of all Transformers.
A picture of him for more insight on him.
This article's idea came when Ashwin Saxena a.k.a. Quiz_Master tweeted that he would like to see Unicron in the next installment of Transformers.
Until next time.