Re: Star Wars Episode VII: The Force Awakens
Personal theory: I think Kylo is actualy the grandson of Darth Vader through Han and Leia. This concept of having a grandchild of Vader turn to the Dark Side was something that I believe was explored in Jason Solo from the EU. I think it would be a great plot point and is something I would love to see. And if Rey is indeed a Solo child, that would make it even better imo.
Prequel Trilogy; Mentor vs. Student, Original Trilogy; Son vs. Father, Sequel Trilogy; Sister vs. Brother.