I’m sorry there isn’t a better answer. I’m sincerely hoping they’ll work on reuniting folks caught up in split guilds and friend groups before release, but who is to know what they’re planning on.
This is the absolute best place to keep an eye on, as they’re updating it regularly with any changes. It can happen at the drop of a hat, so it’s worth keeping an eye on, as they’ve opened Sulfuras once after they locked it down initially.