Autobots
Optimus Prime - blue, dark red Peterbilt 379EX
Optimus Prime(擎天柱) is the Autobot(汽车人) leader who comes to Earth to destroy the All Spark in order to end the raging war between the Autobots and Decepticons(霸天虎) . Optimus is probably the most famous Transformer mostly because he has been in every Transformers series.
Bumblebee - yellow 2009 Chevy Camaro
Bumblebee(大黄蜂) is Sams guardian and the first Transformer Sam meets. In the old show Bumblebee was a VW bug. In the film he is damaged early on and is unable to speak and must communicate through radio signals. Bumble bee was made silent in a decision to try and show the bond between Sam and Bumblebee was way beyond words. Bumblebee stands at about 17 ft.
Ironhide - black 2007 GMC Topkick C4500
Ironhide(铁皮) was not suppose to be in the original film, but he later replaced Arcee(阿尔茜) and made a main Autobot. Ironhide said to be Optimus Prime’s oldest friend and the teams weapons specialist . He is a tough soldier who has sustained many injuries in combat(搏斗；打仗；战斗). He has a large scar(伤疤) surrounding his right eye, and before coming to Earth he had a broken ankle. Ironhide is about 22ft tall.
Ratchet - lime yellow 2008 Hummer H2
Ratchet(力捷) is a Search and Rescue Hummer H2, he is also the medical officer for the Autobots. Ratchet believes the conflict with the Decepticons can be solved peacefully; without any violence(暴力). But he still carries out Optimus Prime’s orders, even if it means using of force. He has enhanced senses, as he reveals Sam’s desire to “mate” with Mikaela by sensing his pheromone levels by using his nose. According to many sources Ratchet has X-ray vision and has photo electric cells which allow him to produce a “chameleon(变色龙)” effect. Ratchet stands at about 19 ft tall.
Arcee - 3 pink, purple, blue custom bike made by RetroSBK
Arcee(阿尔茜) was originally planned for the first Transformers film but was another who just didn’t make the cut. Arcee is going to be made up of 3 different bikes that combine to make her. Arcee is also involved in the chase with a go-cart named Wheels / Wheelbot, and Stinger.
Skids - green 2009 Chevy Beat
Mudflap - red 2009 Chevy Trax
Not much is known about these two Chevys yet, but we do know that these two might be “The Twins”. We do know that these two will be involved in a battle scene by a jail house alongside Bumblebee.
SideSwipe - Chevy Corvette Stingray
Jetfire - black SR-71 Blackbird
This seems weird that Jetfire(天火) is a Decepticon because in the old shows he was always an Autobot. It looks like Sam uses something called the “Splinter” (which is possibly a tiny piece of the All Spark) to activate the SR-71, which transforms into Jetfire. But it still seems weird that he has a Decepticon logo, he is suppose to be an Autobot, but maybe he switched or switches sides?
Wheeljack - white 2009 Saab Aero-X (rumor)
Wheeljack(千斤顶) is the scientist and warrior of the Autobots, he is always inventing new weapons and gadgets(小器具；小装置). Wheeljack was pitched for the original film but didn’t make the cut.
Jazz - hardtop Pontiac Solstice GXP (RUMOR)
First Lieutenant(中尉) Jazz(爵士) is a very happy carefree(无忧无虑的) Autobot. Jazz is one of the smaller Autobots but is as feisty (好斗的) as the big ones, he is not afraid of a fight and that got him killed in the first film by Megatron(威震天).
Decepticons
Starscream - gray F-22 Raptor
Starscream(红蜘蛛星星叫) is Megatrons right hand man….. or so he thinks. Starscream will do anything to acquire or retain power and strength and uses lies and deceit to obtain it. He was waiting at an airbase in the U.S. when he was notified of Megatrons and the Alspark being found. He is one of the only remaining Decepticon survivors and flies off into space at the end of the first film. He was most likely on the way to recruit more Decepticons to continue the fight on earth.
Barricade - black 2008 Saleen S281 Extreme Mustang
Barricade(路障) has always been very loyal to Megatron and when Starscream became the active leader he was not to excited. But he is still willing to give Starscream the benefit of the doubt and follow where he leads. Barricade is also very hateful toward Autobots and would like nothing more than to kill all Autobots. Barricade may not be as big as most Transformers but he is every bit as deadly. He’s smart enough to let one live if he thinks he or the Decepticons can use it to their advantage, but most of the time they are dead before a plan comes up. In a sense Barricade seems to be one of the most tactical(有谋略的) of the Decepticons.
Wheels - blue Toy Size RC Jeep (alt mode unconfirmed)
Another newcomer to the movie is Wheels. Wheels is probably the smallest Transformer, he is in the shape of an RC monster truck.His role is still yet to be announced but I would assume he is going to be like an Autobot version of Frenzy.
Scorponok - metallic scorpion
Scorponok(巨蝎怪) has a machine form of a mechanized scorpion(蝎子). Scorponok is the only Transformer who didn’t transform, but he is able to dive under sand or other soft landforms. Skorponok was another of the only survivors in the original film.
unknown - dark gray Audi R8 (rumor) no official image
The name is as implied, the character is unknown, all that is known is that it is involved in a chase seen at the beginning of the movie and is a Decepticon.
Constructicons/ Devistator - Earth Mover unknown type (rumor) no official image
Not much is known about the Constructicons(挖地虎) in the movie yet but it leaves you to wonder, in the original series the constucticons formed to make Devastator(大力神), why would there only be one? So judging on that I would think there are more of these guys.
Soundwave - alt mode unknown no official image
Soundwave(声波音波) is one of Megatron’s most trustworthy soldiers and has obtained a position of power in Meagtrons army. Even though he is only a Communications Officer, he stands at a similar rank to Starscream seems to be loyal to Megatron to the end. He is not particularly popular among the Decepticons but still remains in Megatrons good graces.
The Fallen - unknown no official image CONFIRMED
Ravage- Dog like decepticon
Megatron - Cybertronian Tank
Megatron(威震天) is the brother of Optimus Prime and the leader of the Decepticons. Megatron is ruthless and extremely powerful. He has only one goal in mind and that is to have the All spark at any cost and then lead a mass genocide(种族灭绝；大屠杀) of the Autobots.