It can be cool to have strange prophecies or visions or ancient writings refer to events that the PCs themselves have done in previous adventures.
In the last adventure you ran, the heroes slayed a dragon? Let them find some ancient tome in a wizard's tower that contains a prophecy of a group of heroes who slay a dragon, making the description uncannily matching the circumstances in which they did it.
Then for a twist, have it describe one small, seemingly insignificant thing in the larger scheme of things, that one of the characters did, which they didn't do, and let them puzzle over what this means.
Commentary by memnarch (who has not seen the movie)
No more info about the laser sword itself? Check! Going over the visions? Check! The visions aren't 100% accurate to what the PC/player remembers? What a shock! I bet whatever plot the GM has besides the PC vs PC stuff is related to this. Will we get any more useful info about the rest of the visions? I'm guessing that's last movie stuff that may or may not have been explained then as we've seen that panel before, so whatever information we get here is going to be comic only. At the very least, I hope there's an explanation of some kind for the domed helmet person coming up.
Transcript
Luke: What else can you tell me about the sword?
Rey: Hmm. When I first touched it I saw a bunch of visions. And... you were in them.
Luke: That’s interesting.
Rey: There was... let me check my notes.
Rey: You and R2 were looking at a big fire. You put your metal hand on him and said, “Rey... the sword. You must send it back.”
Luke: Doesn’t sound like anything I ever said.
Rey: What about the fire?
Luke: Now that I remember.
Rey: Some sort of cataclysm provoked by unchecked avarice and ambition?
Luke: R2 was there, but he didn’t cause it.