One of the most common speculations: The Yuuzhan Vong invade; commit mass genocide, and conquer the entire Galaxy.

Rey is gonna do some Jedi stuff.

Rey will be the new Jedi temple and train the new Jedi

I don’t think we will get a follow up story for Finn and Poe unless Finn returns so he can finally be a Jedi

I've heard that Rouge Squadron are a team of elite make-up specialists who deal with cosmetic emergencies. They will help found a new, better dressed, Jedi Order.