Preview of The Last Summit - A Cooperative Traitor Board Game

About The Last Summit, from BoardGameGeek:

Humanity has survived the apocalypse and settled into tribes across the landscape. Can the leaders of the tribes find a way to compromise and make room for a new nation, or descend back into chaos? In The Last Summit, you'll either work with the other players, or work against them to make your own new world. This is a diplomacy puzzle game with a traitor mechanic, but no traitor card, except the one in your heart.