[Update #2]: Shadowlands' very first major content patch will be landing at the end of June.
[Update]: Blizzard has finally increased Anima rewards from World Quests!
While the full release is still quite a few months away, you might be happy to hear that World of Warcraft's Update 9.1 - Chains of Domination has now landed onto the test servers. So if you would like to take a sneak peek at some of the new content, as well as help the developers out by sharing much-needed feedback, make sure to hop onto the PTR and take the update for a spin.
Update 9.1 - Chains of Domination brings with it Korthia as a chunky new zone to explore, new Torghast layers to test yourself against, a brand new Covenant Campaign story and Renown levels, and as is tradition, some massive nerfs to the currently most powerful specs like Affliction Warlocks and Fire Mages. As for the new raid, the first two bosses of the Sanctum of Domination will become available for testing tomorrow, April 16th.
It's also worth mentioning that Blizzard appears to be working on their own variation of Raider.io's Mythic+ scoring system. How exactly it'll work, nobody currently knows, but everything should be revealed in the near future as the system is currently in the process of getting implemented onto the PTR.
To learn more about the Chains of Domination PTR update, as well as to keep an eye on any future additions, you should head on over to the Blizzard website. Have fun, and I'll leave you with one of the cinematic trailers setting up the new story: