Episode 7: Alderaan gets remade, Leia goes to a remade planet banquet on it and Snoke blows it up with the force. This starts another war between the Empire and the Rebels. In response to Snoke blowing up a planet with the Force, Luke uses the light side to drift a sun into a small planet filled with Snoke horcruxes. Horrified by the destruction, the entire galaxy condemns Snoke and Luke and every nation votes that they should be executed but obviously no one can touch those two so its a moot point.
The Rebels send Rey to Snoke to negotiate a peace treaty and Snoke bangs Rey. Similarly, the Empire sends Mara Jada to Luke and Luke bangs Mara Jade. In a better place, Luke and Snoke announce that all their future conflicts will not involve planets and civilians and will instead occur on Final Destination, a small flat planet with no items. This is where the first film leaves off.
What's Snokes back story though? And are Kylo and Rey brother sister?