Orci, who also co-wrote and produced JJ Abrams' first Star Trek film, explained that Benedict Cumberbatch's mysterious villain John Harrison is crucial to understanding the title.
"He understands Starfleet because he was enlisted in a similar way," he told Star Trek Magazine. "Some might see part of the title coming from the fact that he's kind of a dark shadow of members of our crew.
"He too has gone through the process... that some of our crew have gone though, and clearly for some reason it's failed to bring him over, so I think he represents that part of our heroes."
Kurtzman went on to say that he, Orci and co-writer Damon Lindelof were conscious of the need to retain a sense of hope and optimism in the film, despite a dark plot which will see the Enterprise crew fighting Cumberbatch's "one-man weapon of mass destruction".
"So we're pretty consistent with the last movie in terms of dark things happening, but holding on to the light that Roddenberry set up as a basic tenet of the Star Trek universe."
Lindelof has promised that the sequel will focus on the crew "becoming a family".
Star Trek Into Darkness will be released on May 9 in the UK, and May 17 in the US.
Watch a trailer below: