Sources close to the Gareth Edwards-directed Rogue One: A Star Wars Story, have told the folks over at JoBlo that all of those reports about Darth Vader being in the first standalone spinoff are, in fact, true, and they even reveal that we should expect to see much more of him than we expected. They don?t get into specifics of what this means, probably because their sources didn?t share many, but the fact that one of the most iconic villains in movie history could play a significant role in Rogue One is intriguing. This is, of course, purely an unconfirmed rumor at this point, so make of it what you will.
Take it as you will but I am expecting to see Vader in Rogue One
in some fashion.