The "darkness" mentioned in the title manifests through several central plot points and themes:
If you are looking for actual (on-screen text) for the film: subtitle Star Trek Into Darkness
: It explores what happens when the idealized peace of the Federation is challenged by serious issues like terrorism and internal betrayal. The "darkness" mentioned in the title manifests through
: Unlike many Trek stories involving external alien invaders, the primary antagonist—Admiral Marcus—comes from within Starfleet, representing a corruption of the organization's ideals. subtitle Star Trek Into Darkness