Theories have already circulated suggesting that Rey’s quick mastery of the ancient Jedi practice in The Force Awakens was because she used the Dark Side (as Yoda put it, it’s faster and easier).
This idea becomes even more appealing and intriguing when we consider the fact that The Force could potentially remain in balance even if Rey falls victim to Snoke’s allure.
Rey’s expedited Force mastery — coupled with Luke’s concern for taking her on as an apprentice — could send her down the path that leads her to Snoke.
Kylo Ren has thus far been depicted as a far more conflicted character than a traditional Sith lord in the Star Wars universe, and it’s not hard to imagine that the dissatisfaction that he felt after murdering Han Solo could potentially hint at signs of redemption for him.