Crate Entertainment announced the Forgotten Gods expansion yesterday but a new piece of information has come to light: The Ashes of Malmouth DLC will be required in order to play the upcoming expansion. Forgotten Gods is expected to be released in late 2018.
You can read more about the Forgotten Gods in this recent Grim Dawn news item.
As promised, Crate Entertainment has announced the second expansion for its wildly successful Grim Dawn. Called Forgotten Gods, the new content will send players "beyond the bounds of the Erulan Empire" in order to "reach the sun beaten ruins of a city with secrets that should never have been disturbed".