In the Patch Date announcement, Blizzard has updated a couple lines, noting some new information about Mythic 0 dungeons, and the Great Vault during the Week 0 of Midnight Season 2.
This means that Mythic 0s will drop 292 item level gear (Champion 1/6) from all Mythic 0s, but you'll only get one lockout during the week. After Season 2 launches, Mythic 0s will then become a daily lockout instead. In addition, activities done during the first week of Patch 12.1 WILL count towards your Great Vault.
These are the NEW changes below:
Unlock Schedule
Week of August 11
Midnight Dungeons - Heroic and Mythic 0 difficulties (Mythic 0 is on a weekly reset and drops 292 item level gear).
Credit toward Great Vault Season 2 rewards begins.
Week of August 18
Mythic 0 is on a daily reset (drops 292 item level gear)
