Hi!
As stated on the Coriolis Kickstarter:
This kickstarter is just the beginning. Going forward, we will release a range of supplements to the game, from atlases to the grand campaign that tells the sweeping story of The Horizon: The Mercy of the Icons.
The first part of the campaign is beeing translated as we speak/write. It will explain some of the mysteries of The Third Horizon, as the story behind the mysterious Emissaries, and include new parts of the setting as the jungles of Kua and beast and new darkmorphs among other things.
We will give you more info as we get closer in time.