The weirdest thing I've seen from people is that the idea Luke went to the island to die is the only fitting explanation for why he'd be there, and why he didn't jump back into the fight. There's an infinite number of possibilities. Of course, I think a lot of those possibilities would also depend upon them making Snoke a more intriguing character as well. The villains have really let this trilogy down. None of them have been good antagonists. The closest thing we have to the main villain is Kylo, and it's also pretty obvious he's not the final villain. I really hope Palpatines return, General Pryde, and the Knights of Ren are suitable antagonists in Episode 9. The film deserves it after the wet farts that were Phasma, Snoke and Hux.