That’s an interesting thought. It hadn’t even occurred to me that Rey might have seen into the future.
Either way I’m pretty sure that we’ll at least get a closer look at some of the Knights of Ren. And it seems unlikely that they’ll deviate too much from the concept art that I posted as they’ve already appeared breifly in TFA.
(I’m also quite intrigued by what a “monk of Ren” implies.)