They could add a Wookie celebration on Kashyyk (with Chewbacca's family from the Holiday Special in the frame if you look closely).

And I'm sure there will be one or two new planets in the sequel trilogy which could be thrown in to tie the trilogies together, just like they shoehorned Naboo in there in the 2004 edition even though it's otherwise never shown or mentioned in the original trilogy.

Of course I'm being facetious, but if these movies were treated by their own creator as though nothing is sacred about them, how much of a stretch is it for Disney to take that as a precedent for how they treat them (I've said it before and I'll say it again... watch out for rereleases with the 20th century fox fanfare replaced with the Disney castle...... the logos HAVE changed before.....)

George may be done fiddling with the movies, but Disney hasn't even begun yet.....