I will say one thing, Obito being the big villain does continue an interesting repeated pattern that already existed with Naruto/Sasuke and Jiraiya/Orochimaru.
That is the style of Masashi Kishimoto, the ones u said and now Obito/Kakashi. But this time, I think that this story is far more deep. I can't believe that all of this is 'cause of a lost love. Madara turned Obito upside down but there must be another reason.