I don’t know if this has been mentioned or not, but if Kylo is a Solo/Skywalker and Rey is a Kenobi, then history repeats itself, leading to a duel between the descendants. However, if they are flipping them over and Rey is the one who becomes seriously injured, due to going bad and Kylo returns to being Ben Solo again, does that mean we’ll get a Vader like villain (Rey) in a new trilogy? Or will she be more like the Emperor?
I personally think Luke is referring to the Emperor in the trailer (“I’ve seen this before, it didn’t scare me then…it does now!!!”) He wasn’t scared when he confronted the Emperor. I think I’m wrong, but it’s just a hunch.
They really can’t go down the same road again with Rey becoming like Luke and become a Jedi, can they? I mean, what if Luke had joined Vader at the end of The Empire Strikes Back, and what if they are going down this road and Rey joins Snoke, while Kylo returns as Ben. A Skywalker/Solo decides to become good again, while a Kenobi decides to become bad.