T-RIP

T-RIP is the future counterpart and the prototype of the T-800 Series, he acts as the true main antagonist of Terminator: Salvation.

History
As the resistance prepares for a massive invasion of Skynet forces to culmite in the destruction of Skynet Central, Skynet deploys a series of machines to capture two humans above all others: Kyle Resse and John Connor, While searching thought the prison cells of the Skynet Facility, Connor finds one cell still occupied, but then Connors gets knocked back, when the machine inside bursts out, revealing itself to be a prototype T-800 Infiltrator, after a long battle against T-RIP, he is defeated by Marcus and John Connor.

Trivia

 * Despite being prototype of T-800, T-RIP was shown to be more powerful than his counterpart in first movie, as he nearly killed John at his last moment. This was likely due to being constructed from remains of various Terminators that sent back in time to kill John previously.
 * RIP means "Rest in Peace".