The presently-titled Terminator Salvation: The Future Begins WILL be "a McG film."
The T4 screenplay comes from John Brancato and Michael Ferris, the team that gave us Terminator 3, so that's some good news, I suppose. (On the other hand, they also wrote The Net, Primeval and Catwoman.) Plot details are a bit sketchy at this point, but I'm sure the franchise managers have a plan took keep Terminator 4 and The Sarah Connor Chronicles as completely separate mythologies. (Or do they?)
Sir Erik Davis told us a while back that the new Terminator flicks may feature some digitally-created Schwarzeneggers, so who really knows what the future holds for this series? More details on the Terminators sequel(s) and spinoff(s) once they hit the street. But this does raise an interesting question: Does what you know of the Terminator series "mesh" with what you know of the artistry of McG? Yeah, I'm still scratching my head over this one ... but of course I'm also a bit more curious about the flick at this point.