

Decepticons
CONTAINS SPOILERS
Barricade
Barricade is a Decepticon, transforming into a Saleen S281 Ford Mustang (modified to resemble a police car). He is a hunter/scout of the Decepticons and chose his vehicle mode to easily hide among the humans as a symbol of authority.
In leaked versions of the script, this character was originally codenamed Brawl. The name was later changed to Barricade when the official list of Transformers appearing in the movie was released; the name Brawl would go to another Decepticon.
Barricade will be voiced by Keith David, actor known from "Armageddon"
and "Chronicles of Riddick"..
Thanks to Wikipedia
for the info.

Megatron
Megatron, the leader of the evil Decepticons, will appear
as a stealth bomber. The apparent explanation for the departure from his gun
form is that director Michael Bay does not want to include any sort of size
changing in the transformations, with the writers describing it as cheating The
Sector 7 website, part of the Transformers movie advertising campaign, released
an email on March 23 that indicates that actor Hugo Weaving has been cast as the
voice of Megatron. Weaving is famous for his roles in The Matrix and The Lord of
the Rings trilogies. It has also been confirmed the original voice of Megatron,
Frank Welker, will provide his voice for the official videogames of the movie.
Like all characters in the film, Megatron was heavily redesigned for purposes of realism and focus on an alien aspect of the Transformer race. He appears very bio-mechanical. Nonetheless, he is still silver, has a helmet, heavily built shoulders and large legs, characteristics that some might say faintly mirror the G1 look. Producer Don Murphy noted in a recent interview that Megatron's head design has been changed, and recently leaked images of Megatron's "Battle Mode" shows him to have a helmet, as the G1 Megatron did: likewise, recently leaked concept art proves that one of Megatron's arms does indeed turn into a cannon, helping keep some semblance to his original G1 form.
Thanks to Wikipedia for the info.

Starscream
Screenwriter Alex Kurtzman has made clear that Starscream
will not stray from his treacherous roots as he seeks to overthrow Megatron, and
engages in bickering arguments with him. As ever, Starscream transforms into a
jet - in this case, an F22-Raptor - but is bulkier than most incarnations due to
the lack of mass displacement and the size of the Raptor jet. He maintains a
simian body shape with large shoulders and arms and small bird-like feet,
although his chest is still formed by the jet's nose. His arms can become large
cannons. Although in-keeping with the aesthetic of the movie designs seen this
far, the protoform body is more reminiscent of the classic Starscream design,
with a chest-cockpit, pectoral intake fans, tailfins on his ankles and
triangular shoulder projections and regular human proportions.
In the prequel novel Transformers Ghosts of Yesterday Starscream is leader of the Decepticons following Megatron's disappearance during his search for the Allspark. He and Megatron loyalist Blackout fight, with Starscream the victor. Starscream also attempts to lure the human crew of the Ghost 1 to his side.
Thanks to Wikipedia for the info.


Scorponok
His
machine form is a mechanized scorpion. Screenwriter Roberto Orci indicated that
this Scorponok will be conceptually closer to the Beast Wars character
than the original.
In the film, he and his partner Blackout will attack the Soccent Operations Base in Qatar. Scorponok then chases some Air Force airmen across the Qatarian Desert. He is seen in the trailer, leaping out of the desert to chase after fleeing airmen. He possesses spinning pincers and a large stinger that is described as being movable forwards and back as shown in a leaked toy photo.
Thanks to Wikipedia for the info.

Blackout
Early
leaked scripts of the Transformers movie had a Decepticon helicopter named
Vortex, after the Generation 1 toy. Possibly due to Hasbro's lack of a trademark
on the name Vortex, they changed the name to Blackout.Blackout transforms into a
MH-53 Pave Low helicopter. According to the screenwriters, Blackout is the
largest Decepticon, transporting the other group members and has the ability to
disrupt mechanical devices via EMP.
Blackout has had various different names before being finalised - Soundwave, Vortex and Incinerator; all names have been used on a Transformers toy at some point before. Blackout is said to have a cage that holds Scorponok which is where the Soundwave connection was first made.
In the film, Blackout and his partner Scorponok will attack the Soccent Operations Base in Qatar. He is seen in the trailer in both vehicle and robot mode.
Thanks to Wikipedia for the info.

COMING SOON!
Frenzy, Bonecrusher & Brawl