"Transformers screenwriters Bob Orci and Alex Kurtzman revealed all the robots that will appear in the anticipated film today in a webcast on Yahoo! Movies.

The Transformers that will be in the film include:

Autobots:

Optimus Prime
Bumblebee
Jazz
Ratchet
Ironhide

Decepticons:

Megatron
Starscream
Brawl
Bonecrusher
Barricade
Scorponok
Frenzy
Blackout

Orci and Kurtzman also announced that there will be a contest on the official website soon in which you send in a line that Optimus Prime should say in the movie. The studio will pick one line that will make it in the film.

Transformers, directed by Michael Bay, hits theaters on July 4, 2007.

Source: CS"