I really don't think such a plan would tie too well into Unicron or the Dark Energon disasters. Assuming it's possible for such a story to be written in the first place. True. All right, when Ratchet was pumped up on Synthetic Energon, why didn't he just blow the Energon mine that Megatron was in to kingdom come? In fact, considering how irrational Ratchet was that whole episode, you'd think he'd be using that kind of power like crazy. Assuming that's the actual Unicron and not an avatar of his. But it's too early to tell. Of course, what you're implying suggests that the Autobots and Decepticon already are practically gods. Surely they could hold back their power so as to not to annhilate the entire planet--after all, you already believe they're holding it back to small energy bursts, yes? Also, why couldn't they have just used that power to blow up the orbital Space Bridge? Surely that would be even safer than using it for purposes on Earth. On another note, this would make all past battles in the series seem sort of... petty if you consider what scale Cybertronians are really capable of fighting on. I don't recall that being confirmed anywhere; heck, it's usually been the same size or smaller in other continuities.