TL;DR: Queue for epic battlegrounds on Sunday, April 19th at 5pm CST (6pm EST.)
With the expansion coming to an end and more people playing 20s than ever before due to quarantine, this is probably NA's only (and last) shot at getting epic battlegrounds to pop.
This Sunday at 5pm (CST) we are going to attempt to make a coordinated effort to have random battlegrounds pop in the 20-29 bracket on NA side. EU has been able to do this multiple times over the past year or so, we should be able to as well!
Going to be notifying people of when they should be queuing or of any status updates via the Xpoff Discord, communities, and this thread here.
Xpoff Discord:
https://discord.gg/7rb58Sq
Xpon Alliance community: bL7BAXosokB
Xpon Horde community: Wv7GBZZTjK3
20-29 Battle.net community:
https://blizzard.com/invite/9rPmzhPEg