Episode I: The Beginning
Star Wars: Episode I: The Phantom Menace used the working title The Beginning
Episode II: Jar- Jar's Big/Great Adventure
Star Wars: Episode II: Attack of the Clones used the working title Jar-Jar's Big Adventure or Jar-Jar's Great Adventure.
As an in-joke, the film's working title was Jar Jar's Big Adventure, a sarcastic reference to the negative fan response to the Episode I character.
Episodes III, IV, and V: No working titles
Star Wars: Episode III: Revenge of the Sith, Star Wars: Episode IV: A New Hope and Episode V: The Empire Strikes Back don't seem to have had working titles while in production.
However, the early drafts of the script for Episode IV went by many names, including The Adventures of Luke Starkiller As Taken From the Journal of the Whills.
Episode VI: Blue Harvest
Star Wars: Episode VI: Return of the Jedi used the working title Blue Harvest
Famously, Return of the Jedi was made under the title ‘Blue Harvest’, while the prequel trilogy was made under the name 'JAK Productions'.
- The Independent
Episode VII: Foodles
Star Wars: Episode VII: The Force Awakens apparently shared its working title with Abrams' production company: Foodles
“Star Wars: The Force Awakens” had “Foodles” as a working title.
- IB Times
Episode VIII: Space Bear
Star Wars: Episode VIII seems to be using the working title Space Bear: Episode VIII, according to Carrie Fisher and Mark Hamill. The logo appears to include a picture of a panda.
The actress, who portrays the iconic character of Princess Leia, shared a picture of pet dog Gary resting on her on-set chair which bore the movie's tentative title "Space Bear: Episode VIII."
- IB Times