These are a handful of story threads which could have importance going forward. People complained that a lot of threads weren’t answered in Halo 5, but a lot of these are still relevant and can come into play at a later time. They’re in no particular order.
Admiral Kovalic and Mystery AI
With all the attention AI are getting because of Cortana’s rebellion, it made me wonder what AI Admiral Kovalic was so interested in keeping safe. In the Halo: Initiation comic book, ODST Sarah Palmer managed to save Kovalic, who was transporting his base’s AI when that world came under attack by the Covenant. Why didn’t he just destroy the AI as per the Cole Protocol? Instead he placed the AI in a containment unit and fought his way off world. Makes me think that AI, or at least whatever information it might be carrying, could be much more important someday.
Halsey’s Clones
According to Halsey’s Journal, she made multiple Clones of herself, placed them in cryo stasis and stored them away in a secret location. True Reach was glassed, but I don’t believe she ever said where exactly she stored them and there is always a slight chance they survived. I think it would be interesting if Halsey went and made an “Anti-Cortana” of sorts using these cloned brains. That might sound a little cheesy, (even I think this and I wrote it), but I’m actually thinking of it more like making an Offensive Bias to Cortana’s Mendicant Bias.
The Assembly and Domain
Cortana said she discovered the Domain after being pulled into Slispace. This is interesting because Halsey had attempted to create an abstract fractal structure within Slispace, which would potentially house an AI and extend its life indefinitely. The Assembly are a secret collection of AI who have been watching and manipulating humanity for over 200 years. They were extremely interested in what Halsey had attempted and now that we know Slipspace and the Domain are related it seems like this should play a role in the not too distant future. Plus the Assembly decided they would stop being “shepherds” but instead become humanity’s equal companion.
Spirit of Fire and Serina
Technically we’ll find out more about this next year, but I’m hoping that Halo Wars 2 won’t be a random side mission and actually tie into the events of Halo 5. Serina should be close to 30 years old by now, but she was only a year old when she disappeared with the Spirit of Fire. She couldn’t have accumulated enough information to force her into rampancy, even though it would still be a threat considering her age. AI have been known to live for decades if they had an appropriate distraction, such as Juliana who put all of her effort into protecting the people of the Rubble. Perhaps Serina was able to concentrate on keeping the Spirit of Fire crew alive, but she could still hear Cortana’s message of curing rampancy. Serina could have a difficult decision to make, but I think it would be interesting if she didn’t side with Cortana.
The Ussans and Enduring Bias
The Ussans are a group of Sangheili who fled the Covenant at its founding and lived inside a Shield World all this time. After making contact with some Sangheili and a San’Shyuum who fled after the Great Schism, some of the Ussans returned to Sanghelios. We haven’t heard much about them since and we have no idea if they played any role in the civil war. Their Shield World ended up being reconfigured into some kind of mini Halo Ring, so this could be very important going forward. It would be interesting to sit down and speak with a San’Shyuum who could potentially be an ally. If this place is still secret, it could serve as a refuge from Cortana. She’s powerful but I doubt she’s omnipresent. I doubt this mini-Halo is also galaxy destroying like the real Halos, but it would potentially be a weapon which can be used against pesky Guardians.
Another thing the Ussans have is the Forerunner monitor Enduring Bias. It’s never said what kind of monitor he is exactly, but his “Bias” name could indicate he’s a Contender Class like Mendicant and Offensive Bias. This is just speculation of course, but it would be interesting to finally see another Contender Class. Plus I’m curious to see how he will react to meeting Reclaimers and perhaps UNSC Huragok could finally repair him.
Janjur Qom
Said to be destroyed by a super nova but this has not been confirmed. The Stoics were Tier 5 when the San’Shyuum Reformists left with the Forerunner Dreadnought and if the planet is still intact, that would mean they’ve had 3000 years to advance in technology. Perhaps by 2558 they are advanced enough that they can take care of themselves. It would be great if we can go to them and make first contact in the hopes of them becoming allies. If Cortana believes the planet was destroyed and doesn’t know of it’s location, then this could be another safe haven to form a resistance. Perhaps we can meet up with the Ussans and bring their San’Shyuum, Zo Resken, with us to initiate first contact. There might be some bad blood there but it’s been 3400 years since the Stoics and Reformists had contact. They should at least try to cooperate. Plus it would appear that human figures can be seen on ancient San’Shyuum ruins, which could hint at the old Human-San’Shyuum Alliance and they could learn about it from them.
Insurrectionists and Admiral Cole
A group of Insurrectionists disappeared for 40 years and eventually made their existence known when they defending the UNSC twice against the Covenant. They would then disappear again, never to be seen. It’s believed that Admiral Cole didn’t die during his famous last stand and instead followed them because his wife and child were apart of them. If there is an Insurrectionist colony out there who have their own fleets, then they could be a big help. That is if they would be willing to help, but I think Admiral Cole would do so if he were still alive. I’d like to think that this group could serve as the foundation for a new human government if the UNSC were to fall. We could finally reunite humanity in the ashes of the old UNSC. It would be great if we allied with the other races as well during this fight.
Rtas 'Vadum and Shadow of Intent
We will probably learn what they’re up to in Halo: Shadow of Intent, but I hope that both the ship and shipmaster survive. We know that the Shadow of Intent is out there protecting Sanheili colonies and after what just happened in Halo 5, they’re gonna have to fall back just like the Infinity did. Hopefully these two can rendezvous and coordinate a resistance. If they decide to switch back and forth between Blue Team and Osiris in Halo 6, then I would like to see the two ships split up with each team going to different locations for backup.
The UNSC Infinity for example could take Osiris to find Admiral Cole’s colony, while Blue Team goes with the Shadow of Intent to find Janjur Qom. Showing up at Janjur Qom with a Covenant ship might be a little risky, but perhaps the humans can convince them to help? Or maybe Exuberant Witness and Enduring Bias can assist in helping us? I really like this idea actually.