My one hope for Luke in VIII is that he isn’t just sulking on Ahch-To. I won’t be mad if he is mourning his students but I want him discovering some secret to destroying Snoke and his Knights of Ren or the training of Jedi in secret to be the primary reason/s he’s there.
I also really really want to see a scene wth him and Leia. Would have preferred to see him and back together but Kylo Ren happened.