The Order Hall missions are different. You will send your champions out on scouting missions, they will report back to you and you go and do the content. They can also give you zone buffs etc.
Here is an example given. "Followers will be major champions from lore. Rather than a passive system, the champions will be sent out and prompt players to enter the world; for example: a champion may find an undiscovered cave and report back to the player, who can then go out and find/explore it"