Allow me to add: MegaCon.
It was originally scheduled for April. They pushed it to June. Now they've pushed it to Halloween weekend, but it's only a "mini" MegaCon. They're making it sound like it will be an ~exclusive privilege~, but they apparently canceled all fan group appearances (we're in one of the fan groups traditionally invited, and it appears all "non-vendors" were canceled) and who knows what celebrities will want/be able to spend their Halloween weekend at a convention. So nah, I'll pass on miniMega. The full convention was rescheduled for March 2021.
Gives me more time for my costume, though.