Blizzard have announced that Patch 9.1 will be launched on 30th June - woohoo!!
Patch 9.1 is Shadowlands' first major content patch and contains many new features, systems and content which includes:
A New Zone - Korthia, the City of Secrets
New Covenant Legendaries
New and Revamped PvP Talents
New Shards of Domination System
10 boss raid - the Sanctum of Domination
8 boss Megadungeon - Tazavesh, the Veiled Market
New World Boss: Mor'geth, Tormentor of the Damned in Korthia, the City of Secrets
Additional Torghast content, systems, and rewards
New Mythic+ Season, with a new affix - Tormented
New PvP Season with Adaptable Gear and new rewards
New Covenant Campaigns
40 more levels of Renown
New pets, mounts, toys, transmog sets, and secrets
... and much more!
Check out Wowhead for all the news and info: https://www.wowhead.com/guides/shadowlands-chains-of-domination-patch-9-1-features
What to expect the first and following weeks:
Chains of Domination Release Day - June 29 (US) / June 30 (EU)
- The first 3 Korthia campaign chapters will become available.
- A rapid Renown catch-up will be available to characters that haven't reached Renown 40 yet.
- Mythic Season 1 rewards will no longer be available.
- New content will be available in the Maw.
- Torghast Layer 9 becomes available.
- Ve'nari will no longer sell Season 1 sockets and Conduit upgrades.
- The Renown cap should increase to 43.
Week of July 6 (US) / July 7 (EU)
- The 2nd Mythic and PvP Seasons will start.
- Tormented, the new affix becomes available in Mythic +10 dungeons.
- Sanctum of Domination opens on Normal and Heroic difficulty.
- Ahead of the Curve and Cutting Edge Denathrius Achievements will be removed.
- Mor'geth, the new World Boss will spawn.
- Tazavesh, the Veiled Market mega-dungeon opens.
- The Renown cap should increase to 46.
- Korthia's fourth chapter will become available and with it, you will be able to unlock flying!
- Torghast Layer 10 becomes available.
- Great Vault rewards continue to offer Season 1 items!
Week of July 13 (US) / July 14 (EU)
- The first wing of Sanctum of Domination opens on Raid Finder difficulty along with Mythic.
- Great Vault rewards now feature Season 2 loot.
- Torghast Layer 11 opens.
- The Renown cap should be raised to 49.
- The fifth chapter of the new story will become available.