User blog comment:Wolverine-Man/Season 2 Battle Hints/@comment-26907145-20160731201245/@comment-25968390-20160731222115

I don't normally guess here, but...

Darth Vader vs Kylo Ren? He was originally Luke Skywalker's Jedi Apprentice in an attempt to repopulate the Jedi Order. Ultimately, he defected from the Jedi, and became a high ranking member of the equivalent of the new Sith. You might want to check to see if it's already done first, if it's correct.