if katara were to have a baby with aang do anda think it would end up with lebih than one element to bend,like air and water,air because thats were aang came from. atau if zuko and katara had a babay what element atau elements do anda think it would bend.

actually Aang and Katara DO have a son in the new series Avatar: the legend of korra named Tenzin. he is an airbender that teaches Korra to airbend when she is the selanjutnya avatar

I would think not...even if I didn't know already Aang and Katara's son doesn't. I mean, if anda know about the new serie that is gonna be air. (Avtar: The legend of Korra. anda can google it.)
Anyway I think having two elements would be like wrong, too much power for a person, just the avatar ought too have lebih than one. Just my opinion.