OK, so my general theory WRT Shambhala is that, regardless of what Shambhala actually is, it represents the Vishnan's coup de grace in the evident proxy war that we are currently on the wrong end of in WiH; and that the Vishnans are not, contrary to their claims, a formal dual to the Shivans; that they are simply the result of intelligent life evolving under the selection pressure imposed by the existent of blind, omnipotent god-killers.
Integrating this with the theory found on the Great Darkness thread on this forums, that the GD represents some fundamental, ancient corruption of sentience expressed through the Nagari network, and that the Shivans exist with the primary purpose of keeping any budding civilisations from poking too hard into this matter by terminating them with extreme prejudice before they provide it with a prime vector into the physical realm, we obtain the idea that the Vishnans do not, cannot comprehend the thing at the threshold; that their masterplan will simply result in some arbitrarily-terrible apocalypse as it finds the conduit it has been blindly seeking.
And whilst the Shivans do not, cannot care about the Vishnans' pretensions to godhood, they have noticed and have prepared for this. What is an apatic anima? Battuta's summary was that it amounts to Shivan black ops, and that is certainly consistent with its present actions: finding and turning to its advantage the trump card of the Vishnan-thralled Elders, and mopping up that pesky GTVA while they're at it.