Why! The insistence in clinging to Arnold when he's the least interesting aspect baffles me. There was interesting things to explore about John and his Daddy issues in T2 but taking it beyond that is so forced. His end should have been T2. The Sarah Connor Chronicles showed there was a ton of story to tell without relying on Arnold's Terminator. I'd rather see a Terminator like manipulative Cameron or anti-Skynet Shirley Mason in particular. Do we really need Arnold making lame quips again? He's gone from scary to comic relief, and it doesn't help the franchise to make him a focal point.
I was so happy to find out that James Cameron was at the helm again but this news makes me concerned.