Was having a discussion at work the other night with some workmates about the third movie in the franchise. We got to talking about what we thought would make a good "plot" device. We mainly had the idea of having the key to vector sigma introduced. One of my friends quite surpisingly to me said they could also use tis somehow to introduce circuit-breaker. Anyhoot thats a long way for a shortcut to ask what do you feel sould be the new McGuffin for the new movie?
It's possible that the Key to Vector Sigma could be the next McGuffin even if the so called leaked draft script was about as fake as you can get. Since the concept of the Seekers is in the films now it would be possible to introduce new McGuffins as something they were also looking for that the younger robots thought were just legends. Thus a good reason why no one had mentioned the item until now.
how about energon. back in the early 0's before the first movie came out. I wanted them to have human scientists invent a new form of renewable energy called "energon". shortly after two ships with a dieing race of alien robots crash on earth in a last ditch effort to save/conquer their homeworld. maybe in the third movie autobot and human scientiest team up to solve both of their energy problems and create energon. causeing the decepticons to go apeshit and attack everyone to get it.
Perhaps energon occurs on Earth in some natural form and it's just something recently discovered. Sort of gives you the old idea that the Transformers come to Earth for energy, but then it solves the problem of why couldn't they just pick up energy somewhere else. Might even explain then why the Cube ended up on Earth instead of all the other places it could have gone.
How about no McGuffin. Megatron, in a moment of inspiration goes back to Cybertron with Starscream and not only rallies his troops but he gears up for war good and propper with warships and other assorted instruments of destruction. Optimus Prime is alerted to this by one of his spies, Mirage, perhaps. They've got a scant few months to prepare for outright war. The fate of Earth and of Cybertron hangs in the balance.
Whatever it is, I'd like for there to not be yet another thing from/built by robots from Cybertron that is buried on Earth somewhere. I mean, how many times could they have come here in the ancient past?
Key to Vector Sigma, or something along those lines. There will probably be some McGuffin used to destroy Unicron, I'll bet.
Why do we need a new McGuffin? Why does there need to be some other great source of power? If they really must have one, then they could just stick with the Matrix of Leadership from ROTF or find a way to recreate the Allspark. It's gonna get confusing if they introduce something like Vector Sigma in the 3rd movie.