As a kid, I used to entertain the idea of writing my own fanfic ST. In this imaginary narrative, the villain was an immensely powerful ancient force user, the individual who had originally delivered the prophecy spoken of in the PT. This guy was essentially a grey existential nihilist, utilising both light and dark powers without allegiance to either and seeing the force as more of a spectrum than a binary construct. He wasn't power-crazed like a Sith - for him, everything was a game, an experiment. The old Jedi order exiled him to some distant part of the galaxy for being too damn powerful to control, but knew that there was probably truth in his prophecy given some proven ability of his to observe the future. So he watches the whole Jedi/Sith conflict unfold with mild interest, all the while building his own cult of force users to take on whoever wins. Luke takes out the Sith, and our enemy gives him a few decades to get the Jedi Order up and running again, as a matter of sportsmanship, and to make the contest more interesting. Episode VII starts, and our new antagonist shows up with his amoral cult of force users to attack. He's 1000 years old, but looks about 30. No black cloak and cackling evil demeanour; he wears pure white, just to troll, and speaks like a perfectly civilised and genial individual. He doesn't care whether he wins or loses; he'll die with a smile on his face. It's all just a game. He's been able to see the future up until this point, but now anything can happen. Balance was brought to the force, just as he predicted, but he finds balance boring, and now chooses to continue the conflict himself.