I'm the kind of writer who comes up with ideas, expands on them a bit, then gets distracted by another idea. In the end, nothing gets done! So, I decided I would just drop a few ideas off here and see how they do... though I have to admit that I might still work on them, just because I can't truly abandon anything >.>;;.
G1
1) Optimus and Megatron are avatars for Primus and Unicron, and the war is a continuation of the battle their battle. Only the avatars are aware of it, but what would happen if the other Transformers suddenly found out?
1a) The war ends. No one wants to be a pawn in a game of gods.
1b) The war continues with some surprising side changes.
Movie-verse
2) Primus creates himself a body so he can walk amongst his children, but the only one aware is poor, poor Sam. The human tries to let the Autobots know what's going on, but every time he tries he gets interupted, or gets tongue-tied, or suddenly goes mute. He can only watch as Primus creates havoc, and acts more like a child than some mystical god.
2a) Sam's lover (human or mech) is confused or jealous by the attention he's giving to this new mech. Sam's running around trying to keep Primus out of trouble, and has no time for cuddles or sex.
3) Is similar to 2, but Sam discovers that one of the Autobots on Earth is actually Primus all along. I'm thinking someone unexpected is Primus, rather than Optimus (my vote is Prowl or Jazz).
3a) The mech in question is actually Sam's lover. Sam is somewhat horrified, much to his lover's confusion.
Sam: "You took advantage of me!"
Primus/mech: "What?! How?"
Sam: "I didn't know you were, you know, before we had sex. You took my innocence!"
Primus/mech: "You're being ridiculous... and you were hardly innocent."
4) When Megatron rips through the building after Sam, he growls and snarls like a tiger. Am I the only one that was confused by this? I mean, I can imagine Megs growling and snarling... but kind of like people go about snarling and growling. So, why did he do this? He wanted to scare Sam, so the boy would cower before him and accept his proposal of being his pet-- which he has been planing to give to him since Sam arrived in his hanger and called him 'harbinger of death.' Why? Because there's a human who shows him some respect, damnit. None of that NBE crap. Yes, this idea is cracky.
Well, that's all I got for now or really all I'm willing to let go of fffff.