While I am still convinced that the Caeliar be related to the Borg, I did stumble upon something when I was going through the book again that might be problematic. On Page 110, second full paragraph from the bottom, Inyx explains to Hernandez: "Because the passage of our cities and the others in the past has resulted in no detectable change of the timeline, we have deduced that these events must have occurred in the timeline that we consider standard."
Now, I find it hard to think that the Caeliar hadn't noticed the huge difference in the timeline that there are suddenly millions of Borg running about assimilating everyone.
But that's the whole point of Inyx's statement -- that the event didn't alter
the timeline, it recursively caused
the events that were already part of the timeline. It's a "predestination paradox," like how the Enterprise
going back in time and intercepting Gary Seven was just a part of how events in 1968 had "always" happened.