There goes so much for the speculation and the secrecy surrounding the title of the next “Star Wars” movie. When The New York Times asked director Rian Johnson why December's installment in the series is called “The Last Jedi”, he just straight-up explained who the title referred to.
“It's in the opening crawl of 'The Force Awakens',” he explained. “Luke Skywalker, right now, is the last Jedi. There's always wiggle room in these movies — everything is from a certain point of view — but coming into our story, he is the actual last of the Jedi. And he's removed himself and is alone on this island, for reasons unknown.”
The opening crawl for 2015's “The Force Awakens” does clearly describe Skywalker as the last Jedi at the end of its opening paragraph:
Johnson also shared that the 'first thing' he had to figure out when writing the movie was just why Luke had gone into seclusion in the first place. “I didn't have any answers,” he admitted. “But it's not like you can just pick anything you want out of the air. I grew up having a sense of who Luke Skywalker is. It guides you to a very specific path. I know he's not hiding on the island. I know he's not a coward. He must be there for a reason that he believes in. You're finding a path forward, but there end up being fewer choices than you think.”
“Star Wars: The Last Jedi” opens worldwide on December 15.
Source: The Hollywood Reporter