Personally I really want the Seven Serifs to be a faction. The challanges would be lore based to that faction like Dead Orbit. I REALLY want specialised lore missions and quests for factions. Future War Cult with the machine, Queens Guard in the shattered Reef, Dead Orbit in a lost space station, Osiris in the infinite forest, and the Seven Serifs in the cosmadrome and warmind vault secret rooms.