What if Tenzin's wife is Ty Lee's daughter? That would make me hate Pema a LITTLE less. Actually pema is an air acolyte possibly second or third generation of air acolytes too so probably not related to ty lee
I REALLY want to see more of Toph as a mother. I think it would be funny and sweet and show us more of her soft side and of course see how strict and rigorous she must have been while training Lin and Suyin.