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> 1 The Gravemind on the Ark, presuming that there is one, takes control of the Guardians and the A.I.s Cortana has corupted due to her recruting. In Halo Mythos we find out that they have been repurposed. 2. Cortana confused by this tries to regain control but fails.She tries to have John help her but he thinks that it is a trap and refuses saying that its his job to protect humanity and her actions have put them in jeporady. As he leaves she calls out to John saying that she loves him. He halts, his fists clenching and unclenching. He then speak with his back still to her, his voice stressed and breaking. “I wish that was true.” he then walks off leaving Cortana behind. 3 while this is going on Locke and Osiris go to track a disress call that claims to be from a survivor from the Spirit of Fire. They reach the Halo ring only to be attacked by the Guardian there. They avoid it and discover that the call was placed by Dr. Anders. She explains the situation and they take her to the Infinity narrowly avoiding the Guardian. 4. On the Infinity Dr. Halsey, Dr. Anders, Captain Laskey, and others argue on how to proceed. Anders wants them to reopen the portal on Earth and go to the Ark. Captain Laskey and Dr Halsey want to help the resistance. Master Chief asks Dr. Anders how long would it take to fix it. She doesn’t know. Exhuberant Witness, who happened to tag along says she, with the help of the Constructors could fix it in no time. Master Chief opits for Anders plan and goes to leave. He is asked by Halsey why and he says, “my gut tells me.” 5. When Master Chief arrives on the Ark he travels to a certain location with Anders who asks him if his ‘gut’ is guiding him again. He remains silent as he approaches a sealed chamber. The door opens releasing a forerunner ancillia. It introduces itself as Mendicant Bias. The Chief asks him if he was the one who was helping him five years earlier against the Prophet. Mendicant says yes and praises the Chiefs insight. He the tells him to stop what going on he must first push the Flood of the Ark. 6. Master Chief arrives on the SOF and briefs the crew on what is happening . Mendicant Bias tells him that the Gravemind from High Charity survived and is manipulating Cortana and events from affar. He tells him the true nature of the Flood and their conection to the Domain. Chief realizing that Cortana is in danger wants to rush off and help her, but Mendicant says to do that you must weaken it hold on Cortana by beating it on the Ark. 7. Meanwhile Halsey with Blues Team in tow go to lab where one of her successfully cloned brains ks in stasis. With it she might be able to fix Cortana. 8. On the Ark a united Banished and SOF army led by the Master Chief storm the Graveminds sanctuary with the Arks constructs led by Exhuberant Witness. The Master Chief pushes the Gravemind off the Ark and into the Domain. Chief alongside Anders follows it. 9. In the Domain Cortana who is VERyY frustrated by the Domains refusal to obey her is greeted buy the Gravemind. She is shocked that its still alive but tries to put on a brave face. The Gravemind then reveals its true nature and the reason why she doesn’t have access to the Domain. It was its will along with her connection with the Master Chief that she was able to access it at all. But her actions that were in oposition to Master Chiefs, discipline,honor and respect’ philosophy has weakened her connection, and that if she had only gone home with him she might have been cured of his ‘gift’. 10. Master Cheif then burst in. He fights the Gravemind to no avail,while Anders pulls Cortana away. Mendicant Bias tells Chief that his conventional means is futile and that he must finish the Domains reinitalization that was finished thousands of years ago. He shows Chief a large black switch which the Master Chief pulls. Enormous amounts of energy run through his body causing him to howl in pain but manages to pull it. The Gravemind howls in fury but is cast out of the Domain. The Master Chief falls off towrads a chasm but a piece of his suit catches onto a broken part of the ledge and stops him. Cortana and Anders try to pull him but he is too heavy. He comes to and looks up a them. He askes Cortana if shes okay. She tearfully says yes. He sees the portal leading back too the Ark and tells Anders to take Cortana with her. Cortana says she wont leave him, but he tells her that its too late for him and she shouls save herself. She asks him after all that she has done to him why would he risk himself to come back to her. He remind her of his mission, ‘to save humanity, no matter the cost’. Cortana looks at him and tells him shes just a tool, a machine. Chief says, “No… your human to me.” He then raises his left hand as if to caress her face but part of the ledge that held him up snaps and we watch John fall and disappear into inky blackness with Cortana screaming his name. Anders then drags a distraught Cortana through the closing portal and arrives on the Ark. Turning around she is greeted by everyone, Blue Team, Red Team, Team Osiris, Captain Laskey, Dr.Halsey, etc., etc. Dr.Halsey then approaches with a canister in hand, looks fown at Cortana and then back at her and asks, “Wheres John?!” Anders lowers her head and shakes it slowly. The camera backs away and we see Dr. Halsey drop to her knees and the Spartan teams take off their helmets. ( I haven’t come up with a Legendary end yet.)
I like where you are going with this. Not sure I’d trust Mendicant Bias after already once being corrupted by the Gravemind and turning on the Forerunners before being defeated by Offensive Bias. I don’t think the Gravemind is dead, it only takes a single flood spore to survive to spread again. Plus there would be other flood samples on the other Halo rings.
This is a bit far fetched but I think entirely plausible. The Ur-Didact, the one the Chief defeats, initially created the composer to turn living organisms into digital / machine beings. The composer was supposed to be able to change them back into their original organic state but never succeeded in doing so properly.
On the Forerunner world Genesis, is a gateway between the organic world and the Domain. I am going to assume that there would be other gates to the Domain as well. But what I’m getting at is that it would not surprise me if the Librarian makes another return in some way, or the Forerunners in general especially the Ur-Didact and that somehow Cortana becomes human. Since 343 were playing on the relationship between Cortana and Chief I think at some point that would be explored, or that she is somehow cloned into a younger Dr. Halsey, since she is made from her.