So, what would you say about Headmasters included in TF3? They put pretender (sort of) in ROTF, they put combiner (sort of, cause I think that Devs is just one robot here), so, what if they'll put some headmasters in 3? Sam was running with some ancient artifacts in first and second movie. That's enough. And let's face it - he must have a big role in the movie, and he must do something important. So why not make him headmaster? If they do it, there is a chance that instead running away Sam, we can get one more fighting robot (and this is what it should be about). In second movie we had plenty of transformers but not so much transformers vs transformers fighting. If human leading character become transformer, there will be some action involving him for sure. It also could be just some kind of exoskeleton instead of classic headmaster. There is need for some character evolution and (at least for me) it looks like this is the right way for it. And what could be plot-reason for doing something like that? Maybe there is some powerful enemy (let's say Unicron), who can mess up transformers brains and the only way to avoid that is human-factor added to them?