During the third season, Nickelodeon forced the show onto Nick.com. They also gave a limited budget during the fourth season. This is the explanation why they made a clipshow a little bit before the show ended.
The Legend of Korra (2012-2014) marks the animated debut of actress Eva Marie Saint. Saint had been acting in live-action films since 1954, debuting in On the Waterfront (1954) alongside (the already established) Marlon Brando.
Bolin's hairstyle resembles a "ducktail," a popular haircut during the 1950s that was often sported by greasers. However, the time period of The Legend of Korra (2012-2014) is roughly around the 1920s, seemingly.
The title of the new series has undergone some changes. Earliest mentions about a new series spoke of Avatar: Legend of Korra. However, due to an issue with James Cameron's Avatar (2009) trademark applications, it was changed to The Legend of Korra. Sources suggested that the title would be Avatar: Legend of Korra, but it was later confirmed that the title would be The Legend of Korra in the United States and Avatar: Legend of Korra for the international version.
The Firebender from the Fire Ferrets Pro Bending team and the "love interest" of Korra is named Mako. The actor Mako voiced Uncle Iroh in the original series Avatar: The Last Airbender. A subtle homage to the actor who passed away during the original series.
The show technically ran for only two seasons with twenty-six episodes each, Season 1 being Book 1 (101-112) and 2 (113-126), Season 2 being Book 3 (201-213) and 4 (214-226). Splitting up the two seasons into four Books was done out of necessity, as initially, only twelve episodes were ordered, which included an ending to the first Book, and with balance being a strong theme in the series, it made much more sense to have each Book run roughly the same amount of time/episodes. The average amount of episodes per Book is thirteen.
The trivia items below may give away important plot points.
In Avatar: The Last Airbender (2005-2008), Toph wonders, "Do you really think friendships can last more than one lifetime?" A closure to this was added into an episode in The Legend of Korra (2012-2014), where Toph meets Korra in the episode "Korra Alone" and says, "Nice to see you again, Twinkle Toes." In the first show, Toph would call Aang "Twinkle Toes."
After five days of the release of the final episode, the creators of the show, Michael Dante DiMartino and Bryan Konietzko, officially announced that in the ending, Avatar Korra and Asami fell in love. "Our intention with the last scene was to make it as clear as possible that yes, Korra and Asami have romantic feelings for each other," co-creator Michael Dante DiMartino wrote in a Tumblr post. Nickelodeon wanted to express their support for homosexual lifestyles, so they allowed this. This also marks the first bisexual relationship in any animated series.
Zhao, who first appeared in Avatar: The Last Airbender (2005-2008), reappears in The Legend of Korra (2012-2014) in the episode "Darkness Falls." He has been imprisoned in the Fog of Lost Souls for seventy-two years and has not aged because he is trapped in the spirit world where no one ages.