end The Last Jedi on the Falcon in hyperspace; cut out the Broom Boy ending.
replace The Rise of Skywalker’s Tatooine ending with the Broom Boy ending, which plays out as normal until Broom Boy walks outside…
…where instead of looking up to the sky he finds Rey approaching him, with the implication being that she’s begun her search for students. This wouldn’t require any dialogue; just a couple new shots of Rey composited into the Canto Bight backgrounds, perhaps sold by original close-up footage of a Rey cosplayer’s arm stretching out to offer her hand.
This is a really intriguing idea! I’d love to see this done if any of the video people on here are up for it.