It's a graphic novel related to the Avatar world. It likely continues the story from the Avatar series, perhaps exploring new characters, relationships, and adventures in that universe.
Yes. The Avatar comics provide more depth and exploration of the world and characters. They've been well-received by fans who want to immerse themselves further in the Avatar world.
The main characters could be a mix of old and new faces. The old characters from the Avatar series would bring in the familiarity and the connection to the established story. New characters might be introduced to add fresh perspectives and new plotlines. They could be from different nations within the Avatar world, each with their own unique abilities and goals, all intertwined with the central theme of the promise in the graphic novel.
No, Avatar is not a comic book. It originated as a highly successful animated film and later expanded into various related media, but not in the form of a traditional comic book.