Check out the official press release:
“THE LAST JEDI is written and directed by Rian Johnson and produced by Kathleen Kennedy and Ram Bergman and executive produced by J.J. Abrams, Jason McGatlin, and Tom Karnowski. STAR WARS: THE LAST JEDI is scheduled for release December 15, 2017.”
If you go back to the crawl of The Force Awakens, the title for Episode VIII was in plain site.
What are your thoughts on the title?