It's pretty silly, but you can basically interface spoiler the entire zone progression of Endwalker just from looking at the Rowena collectables list because some of them spell out pretty plainly that they're from the moon, as well the Ultima Thule items that go on about how otherworldly they are.

You also know when the second half of Labyrinthos and Thavnair are going to play out from the level of the FATEs in those areas.