"Their role in this is definitely adversarial, and you'll see how that plays out. You don't need to know any preexisting stories to watch this film. We had shot some stuff that had Klingons in [our first Star Trek film], and we cut the scene. It's a deleted scene on the DVD. But they're back in this one."
Another new addition in this highly-anticipated follow-up is Carol Marcus, portrayed by Alice Eve, a character who has been rumored to be a love interest of Chris Pine's Captain Kirk. While the director wouldn't confirm or deny whether or not sparks will fly between Kirk and Marcus, he revealed that a romance will not come at the expense of the overall story.
"He meets her fairly early on and again she plays a science officer, she's someone who is a part of the adventure. I think Chris is right, because it's very much an action adventure movie and once that gets going it's a difficult thing to park the story and say, 'Let's do a romantic interlude.' Her role is important, she wouldn't be in the movie otherwise."
Star Trek Into Darkness was released May 17th, 2013 and stars Chris Pine, Zachary Quinto, Zoe Saldana, Karl Urban, Simon Pegg, John Cho, Benedict Cumberbatch, Anton Yelchin. The film is directed by J.J. Abrams.