If they could make Jeff Bridges younger for Tron Legacy, aging Ewan to Alec Guinness' age in Episode IV ought not to be a problem. It might even be possible to resurrect Alec the way Marlon Brando was brought back for Superman Returns.
Unless they bring Holochrons into the movies, I would think all Jedi records were destroyed or wiped in the purge. Unless Ben was making recordings on Tattooine for twenty years, he simply didn't have time to leave Luke any messages.
Otherwise, we're pretty much left with Force Ghosts. Ben suddenly appearing to Luke after all these years, to warn him of something dire would have impact though.
I have long thought Luke would go back to Ben's house in the Jundland Wastes someday.
Good points. I also always figured that Luke would go back to Ben's house, I'm sure he would have left him some repository of Jedi knowledge, however small it may be, so he could carry on the tradition.
I know in Shadows of the Empire, Luke goes back to make his green saber, learning from a book there.
I also know that in one of the single best Star Wars books I have ever read, The Life and Legend of Obi-Wan Kenobi, Luke basically finds Ben's memoirs and his accounts of everything that took place in the prequels, Jedi histories, all that good stuff.
There's a lot of potential there for stuff. Flashbacks, et cetera. Obviously they won't take directly from the EU, but still, similar ideas could crop up.
Lucas on his role as a consultant:
“[If the filmmakers ask],‘Who’s this guy?’ I can tell them,” he said. “I mean, they have a hundred encyclopedias and things, but I actually know a lot. I can say, ‘This is this and this is that.' Basically I’m not — I don’t really have much to do.”
Indeed. Somewhat comforting.