Mrebo said: CGI characters stand out. Even in the PT, they didn't entirely mesh. Forcing it into a movie from 1980 isn't going to be any better.

If you consider the way that Jurassic Park presented CGI dinosaurs, does it seem more viable? I understand ESB is an older film, but JP is an example of CGI coexisting quite well within a realistic film setting.

And I have an idea for how to make any new effects Lucas does decide to add fit in better with the original films:

Rather than adding things into the film digitally, CGI elements could be rendered seperately from the film. Those sequences could then be filmed as animation with the cameras originally used to shoot the films. The filmed CGI elements could then be composited into the film in the same way the original special effects were.