Ok so following the success of me Theory on how The Exo Stanger is involved with Osiris, I would like to talk about the Taken King. The Taken King is Destiny's next big Expansion. I will Explain what I think will happen and then explain why I think so, Let's get right into it! In the Taken King Eris has gone too the Queen in search of help to eradicate the Hive Diety, Oryx, Crota's Daddy. I would believe Eris has done so because she has learned info (Maybe a vision or she can feel it through her connection with the hive.) On Oryx being enraged with the death of his Son, The Heir to his throne and planning an assault on the City. Queen Mara Sov will agree and keep in Communications with Eris using her Brother Prince Uldren's Crows as messengers. This is another reason why the Queen opened The Reaf to the Guardians because they will make an immensly powerful ally against Oryx and his forces aswell as inviting them to the Prison of Elders to observe them and find the strongest guardians to lead the charge against Oryx. Meanwhile the Queen has allied with Osiris who has the same plans of taking on the Darkness. Brother Vance has come to The Reaf not only because he wishes to find the strongest guardians to take on Oryx through the unforgiving Trials of Osiris, but because he can communicate with Queen Mara Sov on behalf of Osiris aswell as being so close to the Edge of Light and Dark. Eris will plan out and provide intel on the Hive, Queen Mara and Prince Uldren and his Crows will gather the forces and coomunicate via the Crows, Osiris will provide the finest guardians found through Trials of Osiris, and The Guardians will put the plan to action and Provide the BANG. The story will probably consist of destroying Oryx's Armies as you make your way to Oryx himself. The raid will most likely be beyond the borders of the reef and into the Darkness of the Outer Solar System, my best guess would be Saturn because of some old concept art of ans ancient ship that could be Hive floating amongst the Debris of Saturn's Rings. A lot of this info comes from the Grimoire that I peaced together to what would be believable. First off one of the Grimoire Cards contains an Encounter in which a veiled Woman kneels before the Queen and asks for help against Oryx and the Quenn agrees. Another scene of Eris and Prince Uldren having a conversation in the reef. In one Grimoire the Queen asks Uldren to send one Crow with a message to their "New Friend at the Tower" and another to Mercury(Definately to Osiris.) Brother Vances Grimore card also has a quick message from Sister Faora stating that there is another reason for him being at the reaf than Guardians. I hope you enjoyed, please comment your thoughts or other Theories down below! Thank You!