Diablo 4 has finally been announced at Blizzcon 2019 with an awesome trailer featuring Lilith, Daughter of Hatred and creator of sanctuary.

Diablo 4 Announcement

• Focus on Darker Setting.
• PvP zones
• First 3 classes announced: Barbarian, Sorceress, and Druid
• Mounts with what appeared to be upgradable armor

Diablo 4 Gameplay Trailer

More information will come at the Diablo 4 panel.