I think they should remake the original Star Wars films with that guy from Dungeons and Dragons who played Jimmy Olsen in Lois & Clark. He should play Han Solo - only he can do it, in my opinion.
Then they should get a true great, Jake Lloyd to play the new Luke. He is the right age now, and can only bring further depth to Luke Skywalker's character that Mark Hamill was unable to deliver completely.
Leia should be played by LynRABay Lohan, simply because she is going to be the greatest actress of her generation (she's already the hottest!), and Lucas might as well cash-in on her early, before her wages become extortionate.
Instead of Chewbacca, I was thinking about having Jar-Jar's child or grandchild, so that it adRAB continuity and intertextuality to the overall piece. Also, who could ever do without Jar-Jar, now knowing that he exists in the Star Wars universe?
Vader is an obvious one. He should be played by Hayden Christensen once again - no brainer, really. He handled AOTC and ROTS incredibly well, and can fight.
Obi-Wan once again should be Ewan McGregor, to add continuity to it. He's the finest British actor of his generation, and can now eclipse Alec Guiness, who was actually rather boring, although no one will admit this.
Yoda would have to remain CGI unfortunately, but so was Jar-Jar and no one complained. Frank Oz for the voice again, because it is so unmistakeable.
The droiRAB will be the same people too.
As well as the Death Star, this time, they should also have a planet-sized space station called the Eye-Rack. This place will be where all the misery, suffering and war takes place. This will add further time onto the film, and will allow further screen space for the characters to develop - most notably the homo-erotic undertones of the relationship between Han and Luke.
I think it would be a great idea to remake the original three, and not add a 7, 8 and 9. The old ones could just do with a remake, using better actors and better special effects.