Halo season 2, episode 5 shows this parallel timeline's Fall of Reach aftermath. John-117 and his friends flee to Aleria, a colony world, after barely escaping the Covenant's glassing.
Office of Naval Intelligence and UNSC Fleet Command machinations plagued Silver Team from Halo season 2's start. ONI's Col. James Ackerson first portrayed John-117 as mentally ill.
Since Silver Team was taken from active duty, Kai-125 left with Ackerson in secret before Reach's collapse to train his new Spartan-IIIs from Halo season 2, episode 5.
In Halo 2, episode 5, Vannak is incinerated after his funeral.Riz-028's Fall of Reach injuries, combined with earlier mission injuries, convinced her to resign from Sparta.
Riz stays with the Aleria colonists instead of fighting with John-117 and Doctor Catherine Halsey. It appears that John-117 is the last Silver Team member.The loss of Silver Team may affect Master Chief personally.
Master Chief fights Covenant for first Halo ring alone, despite UNSC Marine support.The Halo 2 finale may reveal Kai-125 and Spartan-IIIs. Kai and John's reconciliation seems unlikely considering Master Chief's ambition to avenge ONI and FLEETCOM, especially Ackerson.