Correct. But from what we've seen so far I have my doubts John Connor is even in this film.
Much of the film seems to have been built as an excuse to bring Linda Hamilton and Arnold back. If that sort of sentimentalism is what's driving the proceedings, then why not Ed Furlong? Why shift the focus to new characters? I know
Ed's in crappy shape, but no worse than Hamilton was and Arnold just had heart surgery.
Sarah Connor wasn't supposed to still be out there protecting the world by this point. She protected John Connor who then would have protected the world as an adults. So I get the sense that John Connor's role as savior of mankind is going to be completely subverted, almost soft-rebootish or Last Jedi-ish (kill the past).
I'm just sensing some serious retconning just as bad if not worse than T3+ on the way.