Rogue One nearly featured an unlikely Star Wars alien with the Rebel Alliance. Writers Gary Whitta and Chris Weitz revealed this news during a recent live Q&A session.
Rogue One co-writer Gary Whitta talked about one of the many challenges about writing for the Star Wars franchise.
A lot of changes were made to the Rogue One story throughout the development process and then later in reshoots.
As for the unlikely alien who nearly joined the Rebel Alliance in Rogue One, the species goes all the way back to A New Hope.