You, or anyone that’s interested in it, could just take over running the old realm Discord. There’s still a few active members and we have most relevant third party Discord vanity URLs.
It’d require some dusting off, resources and such would have to be updated, but we have a handful of members that still chat in here and people are still joining despite it not being advertised for a while.
Those of us that were running it either moved on to Classic or other games when BFA threw retail into a nosedive. Personally, I expect to want to try Shadowlands, but don’t really see myself having the same passion I used to for the game based on what the beta looks like (and due to that my interest in maintaining the realm Discord wouldn’t be there).
I noticed you’re already in the old server, message me on Discord if you’re interested. I’ve had experience running a few active 500+ member servers and can help you get things going as well.