User blog comment:Nomad27/Predictions of what will Occur in Volume 10./@comment-93.213.157.47-20160316141524/@comment-4784862-20160424054143

Mmm...pretty sure when Ainz asks if there's anything floating in the sky, he's actually checking to see if they were either still IN the same realm, or maybe transferred to ANOTHER one of the realms within Yggdrasil.

I don't think it has  any  implications for him knowing about those Greed Kings, though I believe he  DOES  suspect that they might have been players.

As for my predictions...it may not be in this volume, but I think Ainz is going to have some sort of encounter with the old lady or the dragon she visits.

It's already confirmed that Dark Elves are in the world, as the Emperor of the Baharuth Empire mentions that Aura and Mare must be members of that race. For that reason, I suspect he'll find their location and seek them out using those two in order to recruit them. I doubt his country/group will end up fighting them, though.

As for the rest...I don't really feel the need to repeat what others have said for predictions, heh.