Halo 5 left quite a bit of story to be explained. Not in terms of a cliff hanger ending or characters yet to be expanded on like the Warden, but in terms of how the characters came to be in the situations they were in at the beginning of the game and what they were up to during the game.
I personally would like to see a novel focusing on some of these aspects. The main characters I think the book should follow would be Halsey, Lasky, The Arbiter and Fireteam Majestic. I have outlined a few plot ideas for what each of their viewpoints could show us.
Halsey’s Plot
We would catch up with her while she is still with Jul 'Mdama. The story would show how she came to know about the guardians, her contacting Infinity and her rescue by Osiris on Kamchatka. We would later get to see her on Infinity, explore the tensions between her, Palmer and Lasky surrounding her actions of the last couple of years, and their working together for the greater good. We would then get to see her on Sanghelios interacting with the likes of the Arbiter, followed by her and Palmer’s exploits over Sunaion. We would then see their crash landing and efforts to return to the Sangheili camp and finally ending with her reunion with Chief, maybe even to extend past the end of the game to show their interactions.
Lasky’s Plot
Again, the book would start with Lasky prior to the events of Halo 5. We would get to see him and Infinity dealing with the colony crisis with the launching Guardians, receiving the message from Haley, and the discussions with Osman over their course of action. We would also see him briefing Blue Team for their mission to Argent Moon, and the ramifications of them going AWOL. We would then get to see the other side of the coin with Halsey’s return to Infinity and the possible struggles of keeping everyone in check. Later he would contact the Sangheili and send Osiris to help the Arbiter. Following this, Lasky would then get a new mission for Majestic (more on that below), but then Infinity is not seen again until the final scene of the game, opening up the possibilities of expanding what Lasky was up to between Maridian and Earth. Perhaps he was called back to Earth by Osman for protection, or other official secret business? His plot would end with the arrival of the guardian and his emergency jump to slipspace.
The Arbiter’s Plot
This one is more for the fans. We would pick up with the Thel on Sanghelios trying to unite the Sangheili, an extension to where we last saw him in Glasslands. A new leader of the Covenant would rise up in the wake of Jul 'Mdama and would become the Arbiter’s adversary. His story would lead to him becoming under attack at the Elder chamber where Osiris find him. Perhaps he was there for negotiations that went sour, a betrayal in the ranks maybe? We would then get to see his interactions with Palmer and the UNSC at the camp, leading to his attack on Sunaion. Once Osiris is safely on the Guardian, we could then see him hunting down the new leader of the Covenant and putting an end to them once and for all. Perhaps he leads the search party to find Paler and Halsey and help them back to the camp.
Fireteam Majestic’s Plot
Unlike the others who have some of their plot seen in the game, Majestics Plot would be completely brand new and offer readers and fan a story that they know nothing about. We could pick up with them on a covert mission to a colony world that is under siege by Castor and his contingent of Brute forces. In the end, Castor would escape, allowing him to become more expanded as a villain for future games and media. I could also be an opportunity to kill one of them off as Majestic has 5 members while every other team only has 4. Not a massive fan of Madsen, so he would be my choice.
Anyway, after the mission, they would return to Infinity around the time of the Maridian incident. We could briefly see them interacting on Infinity and in the war games, before Lasky gives them a new mission. Following the deployment of Osiris to Sanghelios, Roland detects another Guardian event happening and suggests sending Majestic, in case Osiris fail. They leave on a frigate deployed from Infinity and head to the world containing the guardian. After a brief groundside campaign facing off against Promethean forces, the Guardian launches and prepares to leave. Majestic evac back to the frigate, and not wanting to let it get away, they fly strait towards it as it opens the slipspace portal, following it through, In Amber Clad style.
Upon emerging at Genesis during the final mission of the campaign, they quickly evade the huge collection of Guardians. However, the Guardians soon depart and they start receiving hails from Blue Team and Osiris. Once they pick up the two teams, Chief is told by Locke that Halsey is on Sanghelios, and unable to contact Infinity, decide that returning to Sanghelios is the best course of action. Upon arrival, Locke and Chief take a Pelican to the surface, where a Halsey chapter would pick up and explore the reunion between Chief and Halsey.
That’s about it. Obviously this could end up being quite a lengthy book, so maybe they could release it in two volumes?
Let me know what you think.