: Director McG noted the film's core theme is "where you draw the line between machines and humans," explored through Marcus's internal struggle and his redemption. Extended Media and Novelizations
: John Connor must verify if Marcus is an ally from the past or a weapon sent from the future, while simultaneously racing to save a young Kyle Reese (Anton Yelchin) from a Skynet capture facility. terminator-salvation
The film's universe was expanded through several literary works that provide deeper "detailed text" for fans: 'Terminator: Salvation' brings God-talk into open spaces : Director McG noted the film's core theme