Except the Thrawn Trilogy used Luke, Leia, and Solo extensively. I can’t imagine any of those actors coming back to reprise their roles.
However, they do have to use Thrawn in whatever series they do. He’s just too awesome a villain not to use him.
There’s also the Knights of the Old Republic series (video games and comic books). Excellent stories.
Plus with no union issues to worry about, some real established talent could be brought in to make these movies.
Find new actors... It’s ok, the story will survive...
That series with Thrawn was fantastic.
I would not want to see the Thrawn trilogy made into films. Sorry folks, that idea just leaves me cold for some reason.
That said, if Ewan McGregor could play young Obi-wan, why not have some new actors play Luke, Leia and Han? Peter Mayhew could probably still play Chewie.