The first season of Netflix's live-action Avatar: The Last Airbender series will likely cover all 20 episodes of the original show's Book One: Water, but may skip some minor events. The animated series' season finale at the North Pole, an obvious omission from the trailer, is expected to be covered in the first season of the live-action show due to the casting of key characters from the Northern Water Tribe. The live-action version has the potential to extend beyond the original show's three-season structure, allowing for longer explorations of events and a possible expansion into four or five seasons.

The original Avatar: The Last Airbender show was notably broken into three seasons, or "books," but it remains to be seen whether Netflix's new live-action version will follow the same basic structure. Each season of the animated series followed Aang and his friends as he learned a new element, with the...