SPOILERS! On Skellig Island in late 2015, before The Force Awakens had even been released, its original finale scene between Rey and Luke Skywalker, previously handled by J.J. Abrams, would be partially reshot to create continuity with the start of VIII. Interestingly, a specific prior moment in the VII script with Luke and Rey was removed, at Rian Johnson's request, because it clashed with his upcoming work on VIII, and linked to Luke's Jedi powers. Additionally, Abrams version had BB-8 go to Ahch-To instead of R2, the latter replacing the former via ILM wizadry. This also was changed in request by Johnson- definitely the right creative/character move.
As Rey keenly hold his father's lightsaber out to him, The Force Awakens ends with Luke's face clearly trepidatious, or moved, or at least aware of something. Yet, The Last Jedi doesn't continue from that. In fact, many worldwide die-hard SW fans felt understandably shocked and betrayed when Luke throws the lightsaber so casually over his shoulder-actions which they felt were greatly out of character for the Classic Trilogy hero created by Lucas and brought to life by Hamill...
|On location at Skellig Island.|
It's also never explained in VIII why Luke is wearing his "Sunday Best" Jedi robes at the end of VII when the island's harsh living conditions went against this in VIII. Unless, speculation-wise, he knew that company linked to the Force, or at least Han or Leia, were coming to visit him...
More on the Luke/Rey scenes for The Last Jedi:
More on the two-day Skellig shoot for The Last Jedi, and other filming in Ireland: