This article has Spoilers but there are no spoiler images. But it does reveal a bit about a sequence nothing too spoilerific though. It’s quite interesting and worth a read.
Meet John Knoll
https://www.wired.com/2016/11/john-knoll-rogue-one-star-wars/
There is also going to be a twitter stream on 2nd December with Gareth Edwards and some of the cast. You don’t have to be a member of Twitter to stream the event which lasts an Hour.
Will defo tune in to that.