While it doesn’t sound like these two are particularly chummy now, I would imagine that they’re at a point where they can at least be civil towards one another if they’re collaborating on another movie.
As far as the Dwayne Johnson and Vin Diesel feud is concerned, Johnson reaffirmed to Rolling Stone that their differences ultimately came down to different philosophies when it comes to approaching moviemaking and collaborating, and Johnson confirmed that as a result, they weren’t in any scenes together in The Fate of the Furious.
In terms of what to expect from Fast and Furious 9, while no plot details have been revealed yet, Justin Lin is reportedly in line to direct (which would make this his fifth directorial contribution to the franchise), and Jordan Brewster is expected to reprise Mia Toretto.