I know this might be a bit of a pipe dream (and I have spoken out against it in the past), but if we were to film new shots of characters what would we want?
The reason I ask is I have been in touch with someone who runs the UK garrison of Star Wars costumers (because I'm in the UK so it seemed the easiest, but there are similar groups all across the world and loads in America). I briefly explained what goes on at this site and asked if he thought the people who are involved with costuming might be up for helping with reshooting the odd bit or shooting new scenes or whatever, and he was very supportive. Obviously I still need to speak to the individuals themselves because each person makes the costumes they want so it would be up to them, but their costumes are very much screen accurate so it would save us having to try to buy or make accurate costumes if we can rope in some people who already have them.
With that in mind I was wondering what characters I should be looking out for? I doubt we are going to find anyone who is a convincing twin of any of the main characters, but we could probably find someone with a convincing enough Luke costume to film a shot of him with his hood up walking away from the camera which could then be used to form a shot of Luke visiting his old home (like Ron's mock up). Other examples might be trying to create extra shots to help more smoothly transition between the film footage and the deleted bunker scene or something like that.
Anyway, this is definitely a work in progress of an idea, but I figured it wouldn't hurt to get a few ideas rolling and see if we can make any happen.