The Landsraad
In-game
In Dune: Awakening, the player created guilds will be able to grow into a "House Minor" by allying themselves with one of the Great Houses.[1]
Also through the "Landsraad system" the players aligned with the Great Houses, Atreides and Harkonnen, will be able to "vote on things which will impact the whole world". [1] The Landsraad will be in charge of giving out objectives to the Great houses, instead of the player directly, players will then be able to talk to representatives from their Great House to learn of what their tasks are. These tasks may require factions to work together in order to gain the Landsraad's support.[2] (if they choose, participating isn't mandatory[3])