Simply put: a better version of Terminator Salvation... hopefully.

Aside from the newly created opening and changed ending, this fanedit removes Kyle from Skynet’s hitlist and makes John enemy number 1. Skynet doesn’t know about Kyle’s importance. It only knows about John Connor because of his radio broadcasts that inspire people and spread hope among humanity. Skynet sees this as a potential risk and wants him terminated. Sarah Connor’s original tape message has been restored.

Marcus has been given some flashbacks to slowly reveal his past. Tried to have the various Terminators appear more menacing and dangerous, and cut most of their illogical actions. Last but not least are little cuts and changes in various sequences throughout the movie.

This is a darker movie, following the style of the first Terminator movie. Now, Terminator’s mission has become a race against the clock.
No more cheesy one-liners or ridiculous scenes. The Terminator focuses completely on the mission. The T-X is faster, more powerful and more intelligent. No more romance between John and Kate. A complete new opening, plus a reference to T2′s Cyberdyne Systems.

This fanedit adds the infamous Lost Spider Pit sequence back in the movie.