One thing that would be really nice is if Lucasfilm made these decisions.
Restore the original film grain to The Phantom Menace’s picture quality.
Restore the original color grading for Attack of the Clones.
Restore the original color grading for the original trilogy.
Add every deleted scene to the box set from all nine films, including the scenes found on the original DVD releases of the prequel trilogy.
Add every single behind the scenes documentary and featurette for all the movies.
It would be great to have the unaltered original trilogy too, but it would also be cool if Lucasfilm designed the box set to look similar to the DVD extended editions of The Lord of the Rings trilogy. Maybe they could possibly look like the Journal of the Whills.