His name is Roland Kickinger and he is also a Austrian bodybuilder just like the last Terminator T-800, Arnold Shwarzenegger. Its to bad Arnold won't be back but this guy looks the part. At least they aren't going to CG Arnold! Aint It Cool News pointed out the article from Clinton News Record where this information comes from.
Roland has trailed with Arnold in the past and even played him in a A&E biopic.
The Following is information contain Spoilers so if you don't want to know then don't read the Red! It talks about his role in the new Terminator 4 movie.
"There's a very strong scene in the film where John Connor for the first time meets the Terminator, and he doesn't know if he's a good guy or a bad guy," said Kickinger.
"It's Arnold's character in the first Terminator. That's basically my role, but 20 years before, so it establishes how the Terminator [came] about."
So there it is folks! This is the next Terminator. The guy to fill Arnold's shoes. I have no reason to complain about this casting I think its fine. My biggest hang up for the film is still McG.