Joining Anonymous here is  totorotori  :

Do you think that library is ever going to come back? Also what if Amon somehow found that library and the Owl and that is how he learned about energy building and maybe found other important Avatar secrets?

In the most recent episode of the podcast, I say how I think Amon’s plan is to take Korra’s bending while she’s full Avatar state thereby ending the line of Avatars. Patches says: “How does Amon know that?” and I believe I say something like: “How does Amon know ANYTHING?”

Potentially, he could know if he got into The Library.

That being said, The Library has been buried since Appa’s kidnapping, and we don’t know how many sandbenders it would take to get access to it again. Not to mention that the Owl probably isn’t pysched about visitors regardless of if they are horribly scarred in the face area.

I will say this though: Professor Zei didn’t die. 

I don’t know if that has ANY connection to The Legend of Korra whatsoever.

-Da7e-