Already hotly rumoured, a conference call today according to IGN confirms Activision to develop the game for the Transformers movie.
Activision’s got some solid developers making Spider-Man and an endless stream of Tony Hawk titles.  Few publishers are better suited for this type of license…

Reports coming out of Botcon say there is a Transformers game in development to go with the movie, which is due July 4, 2007. Since this is well past the launch of the 360, PS3, or Rev, its safe to assume we’re looking at a next-gen title.
Hasbro isn’t ready to announce who is working on it, only that they are working on it. The bad news is that it won’t be done by melbourne house, who did an excellent job with Transformers on PS2 last May. The good news is, its unlikely we’ll get a repeat of the abomination
Transformers Tatakai, which only came on in Japan.
And for the un-initiated, the new movie IS based on the original Generation One characters. But if you dodged Transformers on PS2 because it features the Armada cast, you’re missing a hell of a shooter.