Here they are with newest additions: Designs of Ironhide, Bonecrusher, Frenzy and Starscream.
Optimus Prime - "The king!"
Bumblebee - "He's the same underdog character we always knew and loved." [Note: Except he's a Camaro in the new movie.]
Jazz - "He's eager to take on the Decepticons."
Ratchet - "Ratchet, who was an ambulance in the cartoon, will appear in a new form."
Ironhide - "The muscle. A tough soldier who can make any Transformer bust an o-ring just with his stare!"
Megatron - "He's been portrayed as pure evil but we're trying to get a little bit behind the evil in this movie. ... He has a slightly less idealistic version of what he thinks humanity is worth."
Starscream - "Always secretly plotting to dethrone Megatron..."
Brawl - "An extremely pissed off Decepticon."
Bonecrusher - "The closest thing to a Constructicon in the film."
Barricade - "The hunter of the group -- a cop car."
Scorponok - "Closest thing to Beast Wars or Dinobot in the film."
Frenzy - "A smaller form able to infiltrate spaces -- a stealth spy."
The Transformers - The Movie (20th Anniversary Special Edition)