Star Wars - Episode VIII: What Will Happen?

All we know is the plot from The Force Awakens as basis, the planned release in December 2017, and the main cast + new addition Benicio del Toro, who is said to play the main antagonist in that episode:


There are some "leaks", but the validity of those leaks is questionable of course (after all we never got any leaks for Episode 7 either). Nevertheless, the first video about the lightsaber duel is pretty interesting anyway, as the described scene would be absolutely amazing:


Be that as it may, there are lots of things to talk about even without the "leaks":

1. Will Rey / Kylo be fully trained?
2. Will we see Luke in a lightsaber battle?
3. Who will fight who?
4. Will someone die? If so, who?
5. Will more new important/powerful characters be introduced?
6. Will the secrets be revealed that we all talk about since Episode 7, like: Rey's parents, Snoke's identity, Finn's force sensitivity, Maz Kanata's backstory, Jar Jar's return, and many more...