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
: 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. The "darkness" mentioned in the title manifests through
: The film reimagines the iconic villain Khan Noonien Singh (played by Benedict Cumberbatch), who acts as a "one-man weapon of mass destruction". subtitle Star Trek Into Darkness
: Captain Kirk must evolve from a reckless leader into one who understands the weight of command and the necessity of personal sacrifice.