Tenzin

Tenzin is the son of Aang and Katara in the upcoming series Avatar: Legend of Korra. He is knowledgeable in Airbending, and the new Avatar Korra is searching to find him and learn from him. Not much is known about Tenzin so far, as Legend of Korra will not come out until 2011.

Rumors & Speculation
These storyline elements remain unconfirmed.
 * His name may be based off of "Tenzin Gyatso", the shortened name given to the Dalai Lama, also part of the name of Aang's master, Gyatso.
 * It is possible that Tenzin could have a personality similar to Gyatso and Aang. However it is unkown what his personality is at this stage.
 * It is also possible that monks are referred to by their last name by other monks of the same level, so Monk Gyatso's first name may have been Tenzin and thus that Tenzin was named after Aang's beloved master.
 * It can be presumed that following Tenzin's birth Aang was no longer the Last Airbender while he was alive. It is currently unclear if Tenzin will be the only living Airbender in Avatar: Legend of Korra, as he is the only one who has been confirmed but the possibility of further Airbenders being alive hasn't been ruled out.
 * During Avatar: The Last Airbender, Aunt Wu tells Katara that her third great grandchild will be born before she passes away in her sleep.
 * If this prediction came true it would mean that Tenzin may already be married and a father, possibly even a grandfather, by the time Korra meets him.
 * Also if this prediction is accurate and Tenzin has a young grandchild at the start of Avatar: The Legend of Korra this would indicate Katara lived a long life.
 * Even if the prediction was accurate Katara and Aang could possibly have had other children through whom their line was continued through, rather then Tenzin, to the point that Katara could have seen the birth of a third great-grandchild before her death. At this time however Tenzin is their only confirmed child.
 * It must, however, be noted that Aunt Wu's methods are fallible and has admitted that the future can be altered by the actions of individuals. Hence so whether her prediction is in fact relevant to Aang and Katara's future is unknown.
 * Becuase the marrying age in the Avatar World, at least within the Water Tribe, is 16 Tenzin's maximum possible age is approximately 49 to 52.