An hour meeting about the purpose of this meeting.
Meta.

Sounds like a classic

Sounds like a covert powerstruggle.

Or the boss was hung over.

I went to a meeting that ended up being about rescheduling the meeting that I thought I was attending. It took an hour to reschedule the hour-long meeting with input from everyone who needed to attend the hour-long meeting...

Could've just had the meeting itself but no they just have to eat up twice as much of my time.

Makes you wanna get a button like this one: