Star Wars: 8 Director Rian Johnson Discusses Who The Last Jedi Is

In an interview with The New York Times,  Star Wars 8 diector Rian Johnson says the film's title is explained on the opening crawl of "The Force Awakens" and that Luke Skywalker is the last Jedi. There you have it folks. Although he says there is some "wiggle room" in there which surely implies Rey could be the next and last Jedi ....
"It’s in the opening crawl of “The Force Awakens.” 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."