I still really can’t really believe we’re bothering to dance around this one*, but Making Star Wars has some supposed details on what exactly that super famous villain may be doing in Rogue One. (Really, is this fooling anyone? Didn’t think so.)
* Look, spoilerphobes. I respect what you’re trying to do – to a point – but I don’t think you’re stupid. This is not a who-is-Fulcrum level spoiler, and if it doesn’t end up in the marketing I’ll be utterly shocked.
In other Rogue One news, it seems that some costumes from the film will be on display at the Nuremberg Toy Fair. The three in photos from @DarrenArsenal1 appear to be the outfits worn by Felicity Jones, Diego Luna, and Donnie Yen from the film’s sole cast photo.