'Avatar: The Last Airbender' is set to return for its highly anticipated second season. Ahead of the June 25 season premiere, the makers on Friday, unveiled a new action-packed trailer for the next chapter.About 'Avatar: The Last Airbender' season 2Season 2 picks up after Team Avatar’s victory in saving the Northern Water Tribe from the invading Fire Nation. Avatar Aang, played by Gordon Cormier, alongside Katara (Kiawentiio) and Sokka (Ian Ousley), embarks on a new mission to persuade the elusive Earth King to join the battle against Fire Lord Ozai, portrayed by Daniel Dae Kim.Their journey leads them to the legendary and heavily fortified city of Ba Sing Se, where Aang encounters Toph, played by Miyako, a fearless earthbending prodigy who agrees to train him in mastering earthbending alongside his existing air and water abilities.The new trailer offers fans a first glimpse at Ba Sing Se, intense bending battles and Aang’s earthbending training, teasing a darker and more expansive chapter in the live-action adaptation.Watch 'Avatar: The Last Airbender' trailerThe trailer was shared with the caption, "To end the war, Aang must master earthbending - but in the Earth Kingdom, politics, secrets and hidden alliances are a battlefield of their own."'Avatar: The Last Airbender' plotThe upcoming season will also continue the storyline of Prince Zuko, played by Dallas Liu, whose pursuit of Aang remains relentless. Adding further danger to Team Avatar’s journey is the arrival of Zuko’s formidable sister Azula, portrayed by Elizabeth Yu.According to the show’s official synopsis, Season 2 promises “new challenges, new team members and the same quest to save the world,” while expanding the scale of the conflict against the Fire Nation.'Avatar: The Last Airbender' season 3 in the worksBesides renewing the show for Season 2, the makers announced in March 2024 that the fantasy adventure series will also be renewed for Season 3 in March 2024, confirming that the three-part adaptation will conclude the story.