That’s an interesting thought. It hadn’t even occurred to me that Rey might have seen into the future.
Well in the Force Vision she also sees Kylo Ren popping from behind a tree where their confrontation later takes place on SKB. Funny thing is though that Kylo Ren had his mask on in the vision but not when the actual fight went down.
I’m also quite intrigued by what a “monk of Ren” implies.
It’s been rumored that the KoR are like the Church of The Force; non force sensitives that worship The Force. Maybe this Monk is the only KoR with the exception of Kylo that can draw upon The Force.