Announcement probably by press release
Another event with a pre-produced video does not seem to be planned, at least there are no indications in this regard. Such memos precede any hardware conception. At the last event, for example, there was a very similar letter in which Apple chose exactly the start of the event as the time. The leaker recently reported L0vetodream that Cupertino was planning a Christmas surprise. What this could be, however, he left open.
Equipment? MacBook Pro?
Since AppleCare + is mentioned in the memo, it must be a product family for which Apple offers hardware insurance. The spectrum thus ranges from accessories such as AirPods to new Macs. The chances of getting a MacBook Pro 16 “with M1 or M1X chips are not particularly high, however. Various sources have said that Apple does not want to convert further Macs to its own processors until next spring. This applies to the large MacBook Pro as well Also the iMac. If you take a look at the rumors of the last weeks and months, the announcement of the AirPod Studios and the AirTags would be conceivable. Also under discussion was an update of the Apple TV including a new game controller.