McG was recently asked a simple question about his latest movie:

Pitch Terminator Salvation.

Here's how the director replied:

The whole idea for doing this movie is to honour the first three movies but begin again. The big difference is we're post-Judgement Day, whereas the other pictures were all contemporary, with Terminators coming back in time. It's deep post-Judgement Day, it's a new beginning, and because the future is malleable, there are a great many places to go.