Not yet I heard rumors that Zuko is in the season finale. Not sure about the kids though, but there is a litrato that is supposedly leaked of him and his family
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ZUKO!!!!!!!!! YAYA !!!!!!!!!!! it sais he's alive
wolfmaster3000
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HES ALIVE!!!
ImanN_
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No...I think it's possible that Zuko married Toph, because Toph had a daughter (Lin) in Legend of Korra and no one knows who the father is, and no one knows who Zuko was with in LoK either.