In this YAML, you can see how the sort titles are set for multiple shows, as well as adding custom names and summaries for each of their seasons.
metadata:
"Avatar: The Last Airbender":
sort_title: Avatar 01
seasons:
1:
title: "Book One: Water"
summary: "After a lapse of 100 years, the Avatar-spiritual master of the elements-has returned. And just in the nick of time. The Four Nations (Water, Earth, Fire, and Air) have become unbalanced. The Fire Nation wants to rule the world, and its first conquest will be the Northern Water Tribe. It's up to a 12-year-old Airbender named Aang to find a way to stop it. Join Aang, Katara, Sokka, Momo, and Appa as they head north on the adventure of a lifetime."
2:
title: "Book Two: Earth"
summary: "Avatar Aang continues his quest to master the four elements before the end of summer. Together with Katara, Sokka, Momo, and Appa, he journeys across the Earth Kingdom in search of an Earthbending mentor. Along the way, he confronts Princess Azula, treacherous daughter of Firelord Ozai and sister to Prince Zuko. More powerful than her brother, Azula will stop nothing to defeat the Avatar. But Aang and the gang find plenty of Earth Kingdom allies to help them along the way. From the swamps of the South to the Earth King's palace, Book Two is an adventure like no other."
3:
title: "Book Three: Fire"
summary: "Having survived the terrible battle with Azula, Aang faces new challenges as he and his brave friends secretly enter the Fire Nation. Their quest is to find and defeat Firelord Ozai. Along the way, they discover that Ozai has plans of his own. The leader of the Fire Nation intends to use the massive power of Sozin's comet to spread his dominion permanently across the four nations. Short on time, Aang has a lot of bending to learn and no master to help him learn it. However, his friends are there to help, and he finds unexpected allies deep in the heart of the Fire Nation. In the spectacular conclusion, Aang must fulfill his destiny and become a fully realized Avatar, or watch the world go up in smoke."
"Avatar: The Legend of Korra":
sort_title: Avatar 02
alt_title: The Legend of Korra
original_title: The Legend of Korra
seasons:
1:
title: "Book One: Air"
summary: "When Avatar Aang passes, he is reincarnated as a girl named Korra, from the Southern Water Tribe. Against the wishes of her guardians, Korra leaves the safety of her home to travel to Republic City. Before long, Korra’s Avatar skills are put to the test when she encounters a group of Chi-blockers led by a masked man named Amon. With his Equalists followers, Amon plots to gain control over Republic City and ultimately rid the world of the 'impurity' of bending. Korra and her friends will stop at nothing to capture him, leading to an Avatar adventure like nothing before!"
2:
title: "Book Two: Spirits"
summary: "After defeating Amon and the Equalists in their anti-bending revolution, Korra and Team Avatar embark on a new journey deep into the mythlogy of the mystical Spirit World, encountering creatures like nothing they've seen before and discovering the truth about the very first Avatar."
3:
title: "Book Three: Change"
summary: "It's the return of the Airbenders! Korra discovers that new Airbenders are popping up all over the Earth Kingdom. While she tries to find these Airbenders and rebuild the Air Nation, a group of dangerous criminals embark on a mission of their own."
4:
title: "Book Four: Balance"
summary: "To save the world, Avatar Korra endured her most intense battle yet. Now broken and bruised, Korra begins a journey of self-discovery and survival as the strong prey upon the weak. When an aggressive military force rises up led by a familiar face, the fate of the Earth Kingdom hangs in the balance and only the Avatar can set things right."