At least one local theater chain has been running behind the scene featurettes in those video loops that run long before the movies start here.
I still sort of hope this would open the door to a post ROTJ movie with Luke and the gang. Catching up with Dr. Jones after all these years makes me really want to see how the galaxy far far away is getting along.
No question Mark Hamill would do it. He did Luke on the radio, and voicing cartoon characters is his bread and butter!
I would imagine they could get just about everyone else except Harrison Ford. Perry King did an excellent Han Solo in the radio dramas though!