What is there to say about Rogue One (so far). It's a stand alone Star Wars film. The story is about a bunch of rebels that are goig to steal the Death Star plans and we get introduced to Jyn Erso. Gere's some of her background story.
Erso grew up on her own from the age of fifteen years old and developed a reckless and rebellious streak. She had a number of incidents on her record, including the forgery of Imperial documents, possession of stolen property, aggravated assault, and resisting arrest. She was assigned by a leader of the Alliance, Mon Mothma, to learn more about the test of the weapon. As a result, Erso became involved in the theft of the Death Star plans.
What else is there to tell? O yes in the trailer we see the Rebel Base on Yavin. The same planet from Star Wars A New Hope. To be honest I did fing it cool that Gareth Edwards went back to this. But really that is about it. No other character names are known.
So with the trailer out there only giving us the name of Jyn Erso and the plot I have very little to go on.
Rogue Squadron: a Star Wars story will hit cinemas December 16th 2016 and stars: Felicity Jones, Diego Luna, Ben Mendelsohn, Donnie Yen, Jiang Wen, Forest Whitaker, Mads Mikkelsen, Alan Tudyk, Riz Ahmed