We at Unicron.com have received some tantalizing information about the up-and-coming RotF game.  First up, the cast of characters as well as their voice actors:

Autobots:
Optimus Prime voiced by Peter Cullen
Ironhide voiced by Jess Harnell
Breakaway
Bumblebee voiced by Mark Ryan
Ratchet voiced by Robert Foxworth
Aerialbot (Multi-Player Exlclusive)
Protectobot (Multi-Player Exlclusive)

Decepticons:
Starscream voiced by Charles Adler
Sideways voiced by John Di Maggio
Grindor
Long Haul
Megatron voiced by Frank Welker
Seeker  (Multi-Player Exlclusive)

The Fallen  voiced by James Arnold Taylor
Sam voiced by Shia LaBeouf
Mikela voiced by Megan Fox

Robert Kostich, head of marketing licensed properties at Activision, claims that using the film's cast allows them to capture the film's epic storyline, but also allows them to expand the fiction, creating a unique and exciting experience for TransFans!

The PlayStation 3, XBox 360, CPU, Wii, and PlayStation 2 versions of the game shall be rated "T for Teen" while the PSP and TWO unique Nintendo DS versions of the game shall be rated "E10 for Ages Ten and Up."

Finally, we've been told that if Transformers RotF the Game is preordered at your local GameStop, you will receive an EXCLUSIVE in-game GOLD Optimus Prime and Megatron available for Multi-Player mode.

Sounds good to me!  I'm really looking forward to this game.  You can expect me to have a review for it up... well... within the next year after its release... XD
Happy Viewing Everybody!