[Almost] always generating new spoilers! As seen on xkcd.com/2243/
In this Star Wars movie, our heroes return to take on the First Order and new villain:
Lord Juul with help from their new friend Teen Yoda, Rey builds a new Lightsaber with an aquamarine blade and they head out to confront the First Order's new superweapon, The Superconducting Supercollider a space station capable of blowing up a bunch of planets with one beam of energy that splits into many.
They unexpectedly join forces with their old enemy Boba Fet and destroy the superweapon in a battle featuring Kylo Ren putting on another helmet over his smaller one.
P.S. Rey's parents are Obi-Wan and the one driod from the Jawa sandcrawler that says "GONK".