See what happened was Mark Hamill dropped character during shooting of the big revelation of Rey's back story and just went "You know what, screw this, I'm going back to my cave. Luke, out!" as a joke, and then Kathleen Kennedy was all like, "You know what, we can save a LOT of money not having to pay him for the third movie if we just write that in." and Colin Trevorrow was all like "But I was going to do some really cool stuff with him in the third movie." and Kennedy was all like "Okay, Book of Henry, you're fired. What do you think, Ryan?" and Ryan Johnson was all like, "Yeah, sure, whatever."
See what happened was Mark Hamill dropped character during shooting of the big revelation of Rey's back story and just went "You know what, screw this, I'm going back to my cave. Luke, out!" as a joke, and then Kathleen Kennedy was all like, "You know what, we can save a LOT of money not having to pay him for the third movie if we just write that in." and Colin Trevorrow was all like "But I was going to do some really cool stuff with him in the third movie." and Kennedy was all like "Okay, Book of Henry, you're fired. What do you think, Ryan?" and Ryan Johnson was all like, "Yeah, sure, whatever."
That's what I heard.