Now that ‘Rise of Skywalker’ has been released on all platforms for what feels like 10 years already, the dust has settled on Disney’s “Star Wars” sequel trilogy, and we can maybe begin to take stock of what worked and what clearly didn’t. And we can also discuss what might have been, such as with the unmade ‘Episode 9,’ tentatively titled “The Duel of the Fates,” which is a story that actor John Boyega thinks could have better suited his character, Finn.