This discovery may contain future spoilers, it's pretty accurate and there's a good chance it is accurate. Here's my GUESS:
Jacen Solo (AKA Darth Caedus) from the expanded universe books matches Ben Solo very well:
-He is Han Solo and Leia's son
-He often butted heads with his father,
-He was trained by Luke Skywalker
Here's the kicker, he has a twin sister named Jaina who ends up fighting against him. Sound familiar?
Safe to say this is proabably where the movies are headed. Kind of unfortunate in a way, because The Force Awakens was a great and epic movie, it seems that the plotline will be fairly predictable. Ben Solo will continue to fight an inner battle between light and dark, his sister will fight the rebellion and end up meeting her twin brother in an epic battle to the death by the end of it.