>>535733094
Kind of depends. The ''setting'' of the vision was really well-developed, with the Older Brother's role, hobbies and daily life.
Edda only properly learns about humanity, and in turn becomes human-like, way later. She shouldn't be capable of making a scenario that detailed by herself until then. And the scenario's purpose is so she can bridge this gap and learn better of the Adjutant.
So I think the Older Brother is still canon, just that just like the Younger Sister, both siblings are now chilling out in Valhalla with an illusion of a loving mother, while Edda took their details for her purposes.
>>535733515
From what I understand: Edda has been trying to fulfill her salvation purpose but she doesn't properly understand mankind yet. Adjutant (as revealed now) was sent to the Space Station to verify her after she went rogue, but knowing the dangers an AI could cause, he took the necessary measures to erase important data of his own memory for the two-folded purpose of hiding it from Edda and fooling her into believing there is some last resort of ultimate importance in Acropolis' library of normal books so Edda wouldn't destroy the library and this could at very least buy them time to learn how to deal with her.
Edda still implanted an Empathetic Ganglia in the Adjutant which downloads into him the memories of Tau's son and allows her to communicate directly with the Adjutant. This also changes his personality to be more like the Older Brother, who is more emotional and cares about Edda.
But before we could do anything about that, a machine that can spawn titans was stolen and so they had to send Adjutant to investigate which causes most of the worldbuilding in the early chapters as you go there from faction to faction questioning and fighting them for it.