
Originally Posted by
fumei
I don't really think they'll do this. First and foremost is because it's too far removed from FGO already. Yes, the first three of the extra classes were originally made in their stories by human hands to artificially fill some role, and they have no place in the World's own system (Grands, on which Servant summoning is based), but this has had zero bearing on FGO as a whole so far. Not once did they treat the existence of any such extra class as anomalous or even a little bit strange. It's always treated like a natural occurrence. The most we get is profiles (i.e., not story) making half-assed references to the original introduction works (Amakusa being Ruler in FGO despite it being a technicality in Apocrypha). Hell, the appearance of any extra class is taken at face value by all of Chaldea. When Holmes describes Pretender, he simply gives the requirements as far as he conjectures for the Saint Graph pattern in front of him, but he never questions how a completely new pattern somehow came into being.
That, alongside the fact that OC is supposed to be about introspectives from Chaldea's side makes it dubious at best that they would tie it back into the original introduction stories, because arguably, being confronted with the fact that these classes are "fake" or "artificial" to serve a human, selfish purpose, will only further the mental block affecting Chaldea. It would provide the opposite effect to "proving why these classes are to be used for saving the Human Order".
That said, the Alter Ego one will obviously have EXTRA stuff, so there's that.

Originally Posted by
fumei
That implies sentience from the Human Order. What's happening is that with only CHALDEAS remaining on the bleached earth, it became the sole keystone of human history, and so it gets automatic protection from the Human Order (which is literally meant to preserve human history). The text also makes it more than clear that the block is internal, not external. It's a perception thing on our side. Also, the extra classes aren't to be used only by the Human Order, as Romani says they are outside the purview of pan-human history.
But wouldn't introspect things require analyzing them? If their origins aren't determined first, then I don't see how they will ever begin to "understand and assess" them.
Additionally, with that dialogue brought up, now I'm really confused with what it is they need to do exactly. From the narrative, looks like anomalies appear all over the world after the warning is issued, but if the problem lies in Novum Chaldea itself, what do these anomalies have to do with them? Why can't they just analyze the Class containers themselves in Storm Border?
Doylist explanation would be "fillers dude, don't think too hard", but I hope the Watsonian one is given as soon as the first OC released. At least in EoR it's clearly explained to be Singularities caused by Surviving Demon God Pillars
Remnants of The Incinerations
.