Po hit the nail on the head. the three arcs of this movie will be, and I think this is pretty accurate
1- Rey bitching at Luke for training
Finn and Poe cementing what may be the bromance to save a movie franchise
Kylo Ren learning the guitar and moping about his insane level of faggotry
Snoke planning some nefarious shit
2- Rey carrying around Luke on her back with close ups of her sweating and presumably man shit type training, like punching trees and shouting out loud in the rain
Some space battle scene, Poe destroys a squadron of empire First Order TIE fighters to Highway in the Dangerzone while Finn has his first epic battle with Phasm
Snoke takes the boot of Kylo, teaches him to be useful
Princess Leia dies of a broken heart and her RL daughter does some rousing speech to avenge the new republic and attack the Sith.
3- Basically a second big battle, Finn will kill Phasm, Snoke and Kylo will have found Lukes secret hideaway and put the shoes to him, Luke not wanting to hurt Kylo cause safe space era Star Wars
Rey receives the Lukes saber and kills Snoke, Chewbacca jumps out of a secret compartment and shoots Kylo in the face with his trusty bowcaster, whom promply flees for the third movie
Poe and Finn accept their feelings for each other and if there is balance in the force, Rey gets it on with the new Princess Leia