A young woman, Rey, played by Daisy Ridley and possibly the female protagonist mentioned in Episode VI, is a scavenger living in a ship graveyard. Rey lives inside the husk of an Imperial AT-AT alone.
Despite the deaths of the two biggest leaders of the Empire, the rest members of the evil group have not taken defeat lying down. They organized themselves into continued battle, operating out of their new Starkiller Base led by leader General Hux (Domhnall Gleeson.)
Kylo Ren, the follow-up villain to Darth Vader character, is from the Knights of Ren order which appeared after the Battle of Endor in the last film. He will use the biggest rebranding to the lightsaber with a laser.