There might be a storyline where the Lion Guard has to face a new and powerful enemy that they've never encountered before. This enemy could have special powers or a large army, forcing the Guard to come up with new strategies and use their combined skills in different ways. They might also have to seek help from other animals in the Pride Lands that they haven't worked with before.
One interesting storyline could be about a new character joining the Lion Guard and having to prove their worth. For example, a young and small animal who has unique abilities but is initially underestimated by the rest of the Guard.
One possible storyline could be Fuli going on a solo adventure outside the Pride Lands. She discovers a new land with unique animals and has to use her speed and wits to survive and make new friends.
For Lion Guard fanfiction, you might consider a story where the Lion Guard has to face a new and powerful enemy that is not from the Pride Lands. This enemy could bring a whole new set of challenges and force the Guard to adapt and learn new skills. You could also write a fanfiction about the daily lives of the Lion Guard when they're not on duty, showing their more relaxed and fun side, like how they play games or share stories with each other.
You could write an OC fanfiction where the OC is a young animal who idolizes the Lion Guard. This OC could try to prove themselves worthy to join the Guard. They might start off clumsy and inexperienced but through hard work and determination, they grow and develop. Maybe the OC has a special talent like being able to communicate with plants, which could be useful in protecting the environment of the Pride Lands. This could create a story full of growth, friendship and adventure.
For 'the lion guard crossover fanfiction', consider a crossover with 'Zootopia'. The Lion Guard could travel to Zootopia and be amazed by the different animals living together in a city. They might get involved in a mystery in Zootopia, like helping Judy Hopps solve a case that involves some of the African animals. This could lead to interesting interactions between the Lion Guard's more natural and wild ways and the civilized society of Zootopia.
One idea could be exploring Janja's backstory. Maybe he wasn't always so mean. Another could be a story where Janja teams up with the Lion Guard for a common good, like saving their territory from a greater threat.
A more complex idea could be that some of the Lion Guard members gain Pokemon - like abilities. Kion, for instance, could develop a power similar to a fire - type Pokemon's, which he could use to protect the Pride Lands more effectively. This would involve changes in their relationships and how they interact with their environment, as they adapt to these new powers.
One interesting concept could be a human having unique abilities that interact with the powers of the Lion Guard. For example, the human might have a special connection to the magic of the Pride Lands, like being able to communicate with the animals in a different way than the normal animal communication in the Lion Guard universe.
One idea could be a human character getting lost in the Pride Lands and having to learn the ways of the animals to survive. They could form an unlikely bond with a member of the Lion Guard.
One idea could be a story where the Lion Guard has to face a new and mysterious threat in a lemon - filled jungle. Maybe there's a villain who is using the lemons to create some sort of chaos, like making traps out of lemon juice that can paralyze the animals. The Lion Guard then has to figure out how to overcome this unique threat using their individual skills.
Another plot could involve a human who has a deep knowledge of ancient Pride Lands lore. The Lion Guard discovers the human while on a quest to solve a mystery that is endangering their home. The human helps them decipher old symbols and tales, leading to the discovery of a powerful weapon or magic that can save the Pride Lands.