New rumors from Star Wars: The Last Jedi concern the tools Luke Skywalker has with him on the planet Ahch-To, as well as what his mission towards the end of the film is.
According to Making Star Wars, Luke is in possession of a compass, a backpack, and a walking stick while embarking on a journey on presumably Ahch-To.
The safe money would be on any Luke vs. Snoke confrontation being a set piece for the trilogy finale, especially since Skywalker is thought to take out the Knights of Ren in Last Jedi.
Fortunately, Luke is going to be a major part of Episode VIII and factors heavily into the story.