It will take 50 years for that to happen
Someone will own the IP to Star Wars, de-canonize the ST, and use incredible AI technology to cast the ghosts of Ford, Fisher and Hamill in it.
When they're not one foot in the grave.
The only holdup will be Alec Guiness' estate forbidding the use of his likeness in AI, so Ewan McCregor will be ghost Obi-Wan.
