You all got it wrong.
First, they will yap endlessly about the iPhone XR and XS, which by the way is the most popular iPhone ever. Then customer satisfaction and developer preference and of course adoption of iOS12 which will be the highest ever, most popular mobile OS and the usual stuff.
Then they will show the new iPad followed by what will seem like an endless stream of super-boring demos, at least 2 of which will focus on misplaced usage of AR.
Then it's school manager. The demos and endorsments will go on until you loose the will to live.
Finally, when you're just about to burst into tears, Tim Cook will announce the new MacBook. It will replace the current Air, and the non-TB-MBP. The pricing will be sub $1000 as promised but severly underpowered at that price. Expect sub 2GHz CPU, 8GB RAM and 128GB SSD. It will have 2 ports just like the nonTB, it will come in all the same colours as the MacBook, except space grey. It will have the T2 chip, but no face/touchID.
Then, as a final "one more thing", they will show a very vague promo video of the upcoming Mac Pro with almost no tangible information that will make the crowd go wild.
Thank you all for coming...
And no, there will be no new mac mini, but it will be silently removed from the Apple Store after the event.