John Boyega appeared at Awesome Con in Washington D.C. this weekend, and at his panel revealed that Rey and Finn are once again teamed up in Episode IX. The relevant quote, via /Film:
“I haven’t read the script for Episode 9. But Daisy did shoot me a text saying, “Oh my gosh, I just heard from J.J. [Abrams], and we’re back together. That’s what I’m really excited about, is Finn and Rey back together again.”
He also repeated his guess that the next film will bring everyone into “all-out war” – a safe assumption, based on the ending of The Last Jedi.
2019 is a long way off, but at least we know the peanuts will get some significant screen time together.
UPDATE: Video of the panel is up!