But enough of my excuses I wanted to give you guys something so I will give a Q&A.

I have gotten a lot more questions so I'll answer them!

Since you were after Korra who was water you would technically be an earth avatar.

No. Since I count Korra as cannon, Korra is the only avatar the reader will have contact with.

Most likely not. I had done that before as a little reference to the franchise not actual plot points.

It's probably safe to say that they all died out and reverted to "regular" animals. But perhaps you might find an ancient animal.....