Perhaps the luggage in the fantasy novel is a portal to other worlds. It could be that when the character opens the luggage, they are transported to different fantastical realms filled with strange creatures and magic.
In a 'luggage fantasy novel', there could be the idea of luggage that has a sentient being or spirit inside it. This entity might guide the protagonist on their journey, providing wisdom and protection.
One interesting concept could be exploring the backstories of minor characters. For example, delving into the past of a random villager who might have a hidden connection to the main plot. Another concept could be alternate endings, like if the main character made a different choice at a crucial moment. Also, fanfiction might explore the relationships between characters in more depth, such as a deeper friendship or a romantic relationship that was only hinted at in the game.
There might be a young adventurer who discovers the special luggage. This character is usually curious and brave, eager to explore the secrets within the luggage.
One interesting concept is the re - imagining of characters. For example, in an alternate universe, a classic hero could be a villain. Another concept is the different power structures. Maybe magic is used in a completely new way, like being a currency instead of a weapon. Also, the alternate social hierarchies can be fascinating. A race that was once oppressed could be the ruling class.
One interesting concept could be the exploration of unique food combinations as characters. For example, a character made from a rare blend of spices and fruits that has special powers. Another could be the relationships between different food - based characters, like a love story between a pastry chef character and a character made from exotic meats. Also, the idea of food - based kingdoms and their politics can be really engaging in fan fiction.
One interesting concept could be the combination of jutsu from Naruto and magic in Final Fantasy 8. For example, a character might use a Fireball Jutsu in the style of a Fire spell from FF8. Another could be the crossover of character relationships. Maybe Squall from FF8 forms an unlikely friendship with Naruto, and they learn from each other's strengths and weaknesses.
One interesting concept is the exploration of different magical creatures not fully covered in the original books. For example, fanfiction might delve deeper into the lives and abilities of house - elves. Another is the alternate timelines, like what if Voldemort had won the Battle of Hogwarts? It gives a whole new perspective on the story. Also, the relationships between characters can be re - imagined, such as a closer friendship between Neville and Draco.
In 'in time novel', the idea of time as a currency is quite fascinating. Characters have to manage their time carefully, just like we manage money. This concept can lead to intense situations where people are racing against time to earn more time to survive.
I'm not sure specifically as I haven't read a novel titled 'lighter luggage novel'. It could be about a journey where the luggage plays an important role, perhaps symbolizing the idea of traveling light in life, both literally and metaphorically.
One interesting concept could be a crossover of the magic systems. In Final Fantasy XV, there's the use of elemental magic and powerful spells. In Naruto, there's ninjutsu. A fanfiction might explore how a character from one universe adapts to the other's magic. For example, a Naruto character learning to use the warp - strike ability from Final Fantasy XV in a battle. Another concept could be the interaction of the different races. The elves in Final Fantasy XV and the various clans in Naruto could have some really unique interactions, like how the Uchiha clan's sharingan might react to the magic - using races in Final Fantasy XV.
One interesting concept could be exploring the backstories of minor characters. For example, the guards in Baron Castle might have their own motives and dreams that are not shown in the original game. Another concept could be alternate endings. Maybe Cecil and Rosa could have a different kind of ending where they choose different paths in life.