In case you haven't figured out how things work at Tesla yet, let me enlighten you.
Elon takes the most optimistic estimate possible from anyone on the autopilot team. Sometimes he just sets hard deadlines and expects the team to meet them. To add pressure, Elon announces these fictitious dates to the world. When the date isn't met, he is irate at the team and strongly suggests they work the weekends until it is finished. I was told something like this from an autopilot employee.
Yes. So isn't it possible that Elon will make the AP team work weekends in order to push something out by Sept 22? If he can announce some new FSD feature at the shareholder meeting, he can use it to justify his optimistic FSD predictions?