So at this point I think we can safely assume that absolutely anything regarding Kylo and Rey’s interactions with each other is very firmly on Rian’s “No Fly” List for spoilers.
I mean, there are definitely some good inferences and educated guesses out there from the very tiny scraps we have gotten (the Reylo fandom will undoubtedly feast on the bones of that last five seconds of the trailer well past Thanksgiving), and I’m looking forward to seeing who turns out to be right, but in the end, we’re all really flying blind on this because we know nothing.
Personally, I think that’s probably a good thing for the direction I want to see the story go in, as it almost certainly demonstrates a change in Kylo and Rey’s status towards each other (i.e. not mortal enemies trying to destroy each other) that would stun the audience and move them well away from the position they were in at the end of TFA.
But man, the waiting to find out exactly why that’s being kept so strictly under wraps and what their dynamic will ultimately become is a serious pain in the ass.