IGN has the news on the new Transformers game for Wii, DS, and almost every other platform. The game will feature many playable characters from the series, and fully destructible environments. Here’s the quote from them:

The final number of playable characters is still unknown, but Activision has confirmed that Optimus Prime, Megatron, Starscream, Bumblebee, and Ironhide are among them. Each bot has their own set of special skills and abilities too, and gamers will be able to switch between robot and vehicle form at any time. Fully destructible environments (including entire buildings and vehicles) and the ability to use wreckage as weapons are also expected.

It sounds cool in concept and hopefully they deliver on these specs for the game.

Source: Details and Interview