And Royal Guards, anyone?
When the teaser trailer first came out I saw this image and it was one of the most compelling images of the lot. What was this? Was it some sort of chamber for the Emporer since there are Royal Guards flanking it? A bacta tank? Some variation on Vader's meditation chamber?
But now I'm about 2/3rds of the way through Catalyst
. I'll admit it, I'm listening to it via Audible since time to read is at a premium, and listening to the audio book in the car has proven to be far cooler than I anticipated. Be that as it may, the plot of the book has me convinced that this is in fact ***POSSIBLE MAJOR SPOILER*** a giant Kyber crystal that's being utilized for the Death Star's super-laser, as designed by Galen Erso. And it seems very likely that the Empire has been mining these crystals on Jedha.
***POSSIBLE MAJOR SPOILER***