Warforged
There won’t be any Warforged, Titanforged, or Corrupted gear in Shadowlands
Ion "Watcher" Hazzikostas did an interview with Sloot wherein he talked a lot about Shadowlands (check out the liveblog from Wowhead if you'd rather read than watch), including the intricacies of loot drops.
Why I’ve decided N’Zoth isn’t all bad and embraced Corrupted gear
I am simultaneously terrified of and intrigued by Corrupted gear in World of Warcraft.
Patch 6.2 hotfix to gear quality and drop frequency
Some fine tuning changes on gear drop chances and quality are being deployed for next week's downtime.