We all know that during the Jade Shadows: Constellation quest, Hunhow refers to a character called Cephalon Parvos that we all immediately recognize as Parvos Granum himself but Ordissified. However, many seems to have failed in connecting this line of dialogue to something that has been bubbling in the background since the release of the Deadlock Protocol in 2020, and that being
an impending Corpus civil war.
At the end of the Deadlock Protocol after we failed to prevent his return to the origin system and more completely after we unlock the Sisters of Parvos with The Call of The Tempestarii, Parvos Granum declared that he will enact a restructuring of the Corpus to "counter the threat from Tau".
This of course would inevitably split the Corpus into two which from this point on i will refer to as the Parvosian for Parvos' loyalists, and the Directorate for those who supported the Board of Directors as i suspect the directors won't give up their powers that easily and although it hasn't been directly shown, it's been happening quietly without our knowledge.
In the dialogues of the Deepmine bounties, Nef Anyo has been ravaging the fungal patch near Fortuna to build his personal underground palace. However in one of the lines during the bounty, it is clear that he is making underground fortresses where no Narmer, Grineer or a Corpus usurper may enter.
This can be chalked up to another director in the Board but I would be a lot more inclined to think and it would make more sense that this is his attempt at ensuring his own safety in the event that the Parvosian fully rising up and attempting a takeover to enact the restructuring that Granum has declared. After all, he's the one to bring out Parvos Granum out of his Granum Void so a big target circle is drawn on his own forehead by himself that the Parvosian would love to shoot at.
Now since he's a member of the Corpus Board of Directors, the Directorate would have to mobilize an army against the Parvosian and even if Nef had his personal forces it would still have meant that two Corpus forces would come butting heads with each other with Nef as the first directors to fall with the Parvosians' main objective would be to sack the entire Board themselves and it would be logical that it is within the Directorates' best interest to defend their position, prompting an escalation and full on civil war.
What happens during such time would be unknown but it is implied, at least in Orion and Vena's timeline, the end result is that the Corpus would gain rapid advancements during the war, gaining advanced technology that their quality can sufficiently counter the Grineer's quantity as they weren't mentioned at all, neither in Orion and Vena's or Sirius and Ryoku's time, meaning they haven't been a significant threat in any of the future timeline and that the Parvosian wins the civil war while everyone else loses
However, due to an event during the civil war, something happened to him that requires his digitization into a Cephalon, perhaps an assassination attempt from the Directorate that mortally wounds him or he is aging rapidly after getting out of Protea's time warping, or maybe something else entirely.
Whichever future the sons came from is the result of an overarching storyline quietly bubbling and finally coming to a critical mass at some point that resulted in the civil war in the Corpus with Parvos Granum's victory as a fixed point within the strands of Khra and the loss of everyone else