Well, ride reports are coming in from preview riders at Disneyland of the new version.

Spoiler:

Basically, the Empire is after a Rebel spy that is one of the passengers aboard the Starspeeder, with Vader or other imperial forces meeting you at the Star Tours spaceport. Making an escape to one of the other planets, you are then contacted by one of the rebels (Leia, Ackbar and Yoda for some reason) on how to reach one of the bases where the spy you're carrying will be safe, which leads into another destination and the ride's end, presumably avoiding Imperial interference along the way

Mixing the six planets into that base story (Tatooine, Hoth, Coruscant, Naboo, Kashyyyk, and Geonosis with an under-construction Death Star) and other changes and you've got an interesting changing experience.