"Roberto, will there be Transformers that transform into Weapons in TF2? Yes!"
As some of you may have noticed, the Transformers 2: The Ultimate Battle game description mentioned a new transformation system, including weapons. If this turns out to be true, and not a complete bluff, it will add something different. It could be that the bot that turns into a weapon is part of the larger robot, like Scorponok in the first film.
The key line is “A new transformation system gives you more detailed control as you can switch between Robot, Weapon, and Vehicle modes”. But could this mean that all of the Autobots and Decepticons will have a third weapon mode in the new film?
Source: The Transformers