i think episode 7 should do the following. it's borrowed from the eu but in a sense altered. set the movie 30 years after rotj and show a aged luke han leia chewie and lando also show a battle worn falcon , have 3po and r2d2 be a aged. introduce the black sun organization where they kind of unearth a sith pyramid and touch on bringing a sith spirit back ( think of the scene in the mummy with the book of the dead). wether you want to call him plaugeis revan malek exar kun i dont care but i think that would be a cool way to kick off this new trilogy.