From what I've seen on the previews, john and his mother will be befriended by a teenage female terminator who, just like arnie in T2 has a strange emotional attachment to them. The bad guy terminator is also quite young but a guy, who btw isn't big and muscular like arnie, or cold and sinister looking like the t-1000 and thus comes off looking like a tool. Now on top of all of this, these terminators, which by all reports have SUPERIOR powers and blend in better arrive between t2 and t3? So your telling me after those all those failed attempts which will amount to the entire series by the time we get to t3 time they send an inferior female terminator and the resistance only manages to get ahold of the, at that point, ancient t-250 model?
Keep in mind I realize that time-travel isn't linear so they can do stuff like that, but it never stopped the writers of the films from thinking in such a limited linear style. I mean, if it were me, after the first failed attempt (terminator 1) would have sent a terminator back to when Sarah Connor was a child, or better yet an infant. While Sarah and her son ae decidedly special and able to fight back, there isn't any indication that her parents are. Even if a good terminator would have been sent to fight back, it's a lot harder to protect an aging couple with a defensless child in tow.
It'll be about as good as the blade tv series nobody watched. (Which is not very good at all.)