Terminator 4 is on the way and "Terminator: the Sarah Connor Chronicles" is currently running, but there may be one more new addition to the franchise.

According to an interview with James Middleton, a consulting producer on Terminator: the Sarah Connor Chronicles and a producer on Terminator 4, which was posted on thedeadbolt.

com, he is also working on a Animatrix style project for the Terminator-verse titled, “Termination.” Like  Animatrix, it will feature multiple shorts and, “will have a more international flare. This idea of Judgment Day isn’t just something that would affect Los Angeles, so we’d have European animators as well as Japanese Anime masters.”

It is currently in development and for a potential release in 2009.

Source:
http://thedeadbolt.com/news/102958/sarahconnor_interview.php