First there is The Sarah Connor Chronicles starting on Fox in January (a two day premiere, the 13th and 14th).
Now there is news out that there will be a Terminator 4, the start of a new Terminator trilogy. The first film is going to be called Terminator Salvation: The Future Begins. And it will star Christian Bale as John Connor, and supposedly another big name will be attached later on.
It'll need something revolutionary, like the liquid Terminator from the second movie, in order to be a massive success, but with a budget exceeding $150 million something good should be coming our way.