In today’s Empire tidbit, Mark Hamill doesn’t give us any hints to the film itself (Because Mark Hamill can keep a damn secret,) but he does share an interest parallel:
“It reminded me of when I was in Tunisia on the salt flats [shooting the first Star Wars]. If you could get into your own mind and shut out the crew and look at the horizon, you really felt like you were in a galaxy far, far away. I had that same wave of emotion happen to me when I was on Skellig Michael in Ireland. I wasn’t anticipating it.”