So they call it the New World after all?
Good to know.
Gotta change that in the Graphic then if you are to be trusted.
WWKnight is definitely to be trusted. While I don't know if he is technically employed by Lightmare, he writes most of the official lore.
I didn't know that Talich and Reish had no contact whatsoever though, I thought the Flamedawn traitor was testimony to the fact that they did, though perhaps indirectly.
The way you describe it though seems to link all Worlds to the Old World/New World, while not linking them directly to each other, which is interesting as well.
It would basically mean that the Old/New World becomes a Gateway that is linked inbetween Worlds, thus the main battleground of the Infinity Wars,
and implies that the Calamity only weakened the Walls between the New/Old World and other Universes,
not between Universes other than the New/Old World.
I believe Pras doesn't fit into the lore yet, and neither does the Defiant Hermit. If I remember correctly, then the only world everyone had contact with was Avarrach, not the New/Old World. I haven't seen any evidence that The New/Old World has interacted with Riesch outside Defiant Hermit, which hasn't been officially recognized in the lore as of now.
You're right about the locations, by the way. They do support my point better than my evidence. Also, the Beast of Burden, One of Many, and One of Many Exhumed support this point. (I believe the One of Many-type creature on Talich was wiped out long ago.) However, you may be right that the Calamity may not have been the event that caused the one original world to split. In WWKnight's Introduction to the factions of Infinity Wars Part 2, he said, "The world of Avarrach was unique, in that humanity was not wiped out by it’s version of the Calamity." This implies that there were multiple "versions" of the Calamity. However, that could mean that Avarrach was the original world, and the other worlds broke off from it, with most of the people not affected. I also still believe that there was a split at some point, resulting in Aleta, the One of Many-type creatures, and the locations. I just no longer think the Calamity was necessarily what split them up.