JJ Abrams would like to make a Knights of Ren movie
“I gotta say Kathy Kennedy, who’s running it all, she seems to be pushing all the right buttons. There isn’t something that I’d love to see—I guess the one thing I would say is there’s a Knights of Ren story that I think would be pretty cool to tell.”
Given Abrams’ comments here, one could infer that there are currently no plans to further explain the Knights of Ren backstory in Episode VIII or Episode IX. Or maybe Abrams is talking about a specific Knights of Ren story that he cooked up during the development of Force Awakens that didn’t make it into the film.
The Archery Range 