New 'Rogue One: A Star Wars Story' trailer features Darth Vader, introduces new droid

The force is certainly with us! 'Star Wars' fans will once again and very soon get a glimpse of Darth Vader, the legendary dark Sith Lord.

Also, the team seems to have finally found or made the perfect match for droid C-3PO by shining the spotlight on a new droid K-2SO in the new trailer for 'Rogue One: A Star Wars Story'.

The human-size droid, voiced by Alan Tudyk, is an Imperial security droid reprogrammed to serve the Rebel Alliance. He is touted for his ability to blend in at Imperial installations and outposts.

The sneak peak reveals that K-2SO has the potential to kill a group of Stormtroopers with just a single blast.

"I'll be there for you. The captain said I had to," he tells Rebel soldier, Jyn (Felicity Jones).

The standalone film takes place in a time between 'Star Wars: Episode III-Revenge of the Sith' and the original film 'Star Wars: Episode IV-A New Hope' and focuses on the formation of the Rebel Alliance and their mission to steal the plans to the Death Star.

Also termed 'Rogue One', the Gareth Edwards directed flick also stars Mads Mikkelsen, Forest Whitaker, Donnie Yen and Jimmy Smits, who reprises his role of Bail Organa, princess Leia's adoptive father.

'Rogue One: A Star Wars Story' hits theaters on December 16.