Admittedly he could come back as a Force Ghost in ep 9, But yeh, Jedi can be plural.The Enquirer said:Jedi can be plural or singular. Also it's been confirmed since the summer that he'll be in episode 9.Frankster said:Eugh i hope this isn't an excuse to kill off Luke so Rey becomes the last jedi left.
Actually whilst am wishing for stuff, i'd like it of luke survives all the events of this new trilogy, make him the sole survivor out of the old cast and avoid the "old mentor dies" cliche.
I honestly think the title is referring to Luke, as Rey technically isn't a Jedi yet (unless a considerable amount of time has passed) The red outlining could imply Kylo comes back to the light to be one of the last Jedi, he did seem conflicted before he killed Han. And if rumours are true, Kylo discovers Lukes location and launches an attack with the other Knights of Ren. So i could definitely see Luke breaking Snokes hold on Kylo.
Hope we see more of the New Republic as well, would love to see how the New Republic reacts to what The First Order did.