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.
Luke, Han and Leia should all be dead, or maybe Han should be around and very old.
The main protagonist should be a young jedi by the name of Anakin Solo.