For context, Diablo 4‘s expansion, Vessel of Hatred, was released around 18 months after the base game was first released.
General manager of the Diablo franchise at Blizzard, Rod Fergusson, has spoken about the future of Diablo 4, as well as the franchise as a whole going forward.
The expansion brought with it a host of new features to Diablo 4, including an entirely new region and new playable class.
For more details about Diablo 4, check out our review of the original.