What if Luke dies? Is there any foreshadowing of this? I'm so worried. I want him to make it to episode ix. He needs to be on the finale and rebuild the Jedi.
I don’t think there’s anything to indicate Luke is set to die in this trilogy at all. Most theories about this stem from thoughts like, “Oh well Han died so Luke must be next!” or “They need to pass the torch on to the next generation, which means Like has to go.” And, of course, you have Luke haters who just don’t want to see him onscreen for…some reason.
There’s no real narrative reason to kill him off beyond “shock factor,” and in that case…well. Han’s death already had that one covered. I don’t see any reason for them to kill him in TLJ, though, especially since we just had all that dramatic setup for him in TFA. It would be clunky and awkward (and also bad because they’re killing off Luke).