I recently reread the Cohort Intelligence Files, and I feel as a fandom we've not given nearly enough consideration to the possibilities of the year 9995, five years before the beginning of GTN:
17 year old Second Lieutenant Judith and 22 year old Marta are on the Leviathan-class ship Emperor’s Dominion and awarded commendations in within-system war games.
The twins turn 16, presumably with some pageantry (and the looming realisation that perhaps they will not be able to continue their ruse indefinitely).
Isaac and Jean, aged 8 and 9, make their cav vows, presumably while they are still attending school at Koniortos Court.
Abigail becomes head of the Fifth House and makes her husband/seneschal her cavalier (an action which is perhaps only allowed to slide because she apparently doesn't plan to stay in post for long).
15 year old Cam and Pal are two years into Pal's extraordinarily young tenure as Master Warden, perhaps beginning the first overhaul of the Spire in half a myriad.
Dulcinea stops making public appearances as Duchess of Rhodes.
Eleven year old Silas begins to learn how to siphon from Colum.
Harrow begins to puppet her parents, the last Cohort chaplains and construct adepts are lost in action, and the Ninth is closed to pilgrims (and in the Harrow Nova AU, Mortus steps down from his post and scarifies Ortus).
And presumably, John Gaius is running the numbers on the approach of Number Seven and his remaining numbers of Lyctors, and considering his options...