Update – so the flight operated about half an hour behind schedule.
Interestingly, FR24 showed a variety of different aircraft over the course of the day (while still showing as cancelled). I can only assume that there was some juggling going on in the scheduling system.
Apropos of nothing, BZG is a fun airport. They've five gates, though as of right now there's no more than one flight operating at any given time. Families with children of any age get priority at the security check :-)