So many of us from the MMO community know that having a common enemy is only natural. Well as I see it In Destiny we have the Darkness An disembodied entity that is coming for us. Now there are the Fallen, Hive, Vex and the Cabal but they are all in them self beings that want to control the universe/galaxy not the direct harbingers of the Darkness we are fightning. So if the Traveler is the Embodiment/Avatar of the Light and he/it created the Ghosts to find and create Guardians then in turn should the Darkness not at some point create an Avatar of its own. Might I Suggest the Devourer/Destroyer (Pick a shape since the Traveler is a sphere) now then it creates Wraiths which in turn go out and find warriors of the Darkness Called Archons. (Mind you all the names are up for debate) This now gives Players sides to chose and opens up many new missions as well as new Classes and PvP options galore! This is just one Old MMOers Opinion/idea to further the advancement of Destiny and continue to build the Legend!