You're right, that's more like how they are going to show it. T1 scenes are still canon that way. But now I wonder are they setting the movie in the 80s or modern day? If modern, then it feels more like a reboot. Grrrr...forget it.
I was willing to accept that a grown old T-800 is sent back in time, but this whole T-800 raising Sarah really threw me off.
Again lot of creative ideas sometimes seem dumb and ridiculous when described in couple of sentences, the actual execution makes all the difference. Need to wait and watch.