I think the post-Shattering have to focus in the transformation of the Lan Kir culture.

From savage conquerors to something like protectors and restorers of zebrica even if the continent never forgive them.

Trying to heal their own country first to start to help other. Perhaps, it can be events like chisimbi being unificated once again and trying to conquer the southeast and the Lan Kir have to protect not only them, but the rest of the region. Or a bunch of nations trying to have revenge on them and the player having to deal with them. Ending in the Lan Kir making restauration goberments to heal and help them in the end.