Certainly teasing the idea of Vader and Palpatine. Typically Vader doesn't have a hood, but it sure sets up to a main baddie kneeling before the Emperor.
http://screenrant.com/star-wars-rogue-one-darth-vader-spencer-wilding/?utm_source=SR-FB-P&utm_medium=Social-Distribution&utm_campaign=SR-FB-P
At some point they are going to need a new voice for Vader. JEJ can't do it forever, and they look like they are going to tap it for all it's worth.
I wonder if it's one of those things to where they can have JEJ do voice overs in advance to up and coming movies
I wondered up until the blinding incident of the guy with Luke's whereabouts in 7 wasn't Kanaan. Still wonder.
I have no doubt there are a ton of people out there that can do a very good imitation of JEJ doing Vader.