"I'll be back"! - He wasn't kidding.

[Feuer Frei!]

Arnold's back. Terminator 5 will feature Arnie as the Terminator one more time:

Four years after the well-intentioned but dull Terminator Salvation, it appears that Skynet’s favorite unstoppable killing machine — literally — will once again make good on its promise to be back with new reports emerging of a brand new Terminator movie to start production in January of next year. What’s more, the original Terminator star Arnold Schwarzenegger has announced that he will starring in the next iteration of the long-running franchise.

SOURCE