In the first teaser there is a scene where John tells one of the Terminators that they killed his father, so this would be the current timeline after the first Terminator was sent back.
T4 took so many years to get going I wondered if it would happen at all! Seen all T movies so far on the first screening here in the UK and hope I am up to T4's first screening.. Trouble is, since watching the first one I have got grey hair..
Heh, why not show an old abandoned re-election campaign office featuring old posters of the then-Governor of California, whose face was evidently subsequently used by Skynet in making the T-800s?
(OK, logic fails there if we want to nitpick, if survivors spotted the former Governor from years ago pre-Judgment Day they'd suspect a skinjob immediately. It's not a good disguise to use the face of a celebrity.)