What do you think happened to Zukos mom?

They did a side chapter called "The Search." It shows Ursa's past. Ursa is Zuko's mom by the way.

http://avatar.wikia.com/wiki/The_Search

As we know Ursa was banished and supposedly went back to her home village.

mabe she died in battle or something i just would love to say she was a bad *** warrior with quite a few powers

well i have read in the comics that she is alive. she forgot her name (new name is Noriko) and everything from her past. and is married to some other guy whom she loved before marrying Ozai.

it was a wish that she asked to a spirit(mother of faces). the spirit changed her facial looks.

check the image attached.

Don't care

I don't think they ever told us, I wish they had made one more chapter of The Last Airbender instead of movie straight onto Korra, there were so many loose ends that needed tying up and it's depressing how 99% of all the old characters are dead in the new series...