User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-10487081-20130313232701/@comment-4649443-20130319003028

I'm on Dark's side. I think it's like a portal. The Underworld is just too big to fit inside the Earth...I mean, how many dead people are there? About 1,000 times as much as the total population of the Earth. They just can't fit.

P.S. I noticed something. If PJO/HoO and KC are in the same universe, that means that Gaea/Terra and Geb are probably rivals.

P.P.S. I know this is unrelated to HoH, but when the Norse series comes out, I hope they have references to Skyrim and "The Immigrant Song" by Led Zeppelin(if you haven't heard this song, search it on YouTube and listen to the lyrics.)