Is Disney really just going to hope against hope that the billions of movie-watchers who heard Snoke himself utter the phrase “Knights of Ren” in the previous film will never wonder what become of the KoR?
We are only two parts finished of this Sequel Trilogy - there is a reasonable chance that the Knights Of Ren may be mentioned again - or their story told - in the final part of this Trilogy.
If not - you indeed have a valid point. Until then though…