The eagerly anticipated follow-up to the War For Cybertron game has been officially announced by Activision, called 'Fall of Cybertron' and is scheduled for release in late 2012 (spring here).
A press release by Activision (which doesn't say much about the game itself) can be seen here.
A couple promo artworks can be seen here, which are from the gameinformer website, and will be the two covers of their next magazine.
More info will be in the November issue of the gameinformer magazine (not sure if it's released here, but is released mid-October).
Since WFC is tied into the Exodus/Exiles books, expect the game to follow events set up in those stories, as the end of WFC game had them evacuating Cybertron, leaving just a handful of Autobots left behind.