Another creative concept is that the Lion King characters are brought into the modern world of the Avengers. Simba is amazed by the tall buildings and technology. He teams up with Captain America to learn about leadership in this new world. Meanwhile, the other Lion King characters get into all sorts of comical situations. Nala might be intrigued by Black Widow's fighting skills and ask her for lessons. And the hyenas could cause chaos in the city until the Avengers and the Lion King crew work together to stop them. This would be a fun mix of two very different universes.
A really out - there fanfiction idea would be that the Lion King's Pride Lands are actually a hidden dimension within the Marvel universe. The Avengers discover this dimension when they are investigating a strange energy signal. Once there, they find that the Lion King characters have a special kind of magic that is connected to the Infinity Stones in some way. They have to work together to unlock the secrets of this magic and use it to defeat an enemy that is threatening both the Pride Lands and the regular Marvel universe. This would involve a lot of world - building and exploration in the fanfiction.
The idea of Pokemon having the same social structures as the animals in the Lion King is very creative. For instance, electric - type Pokemon might form a group like the hyenas, being mischievous but also having their own hierarchy. And the grass - type Pokemon could be like the antelopes, being peaceful but having to be on guard against the 'predator' - like Pokemon.
One idea could be that the ponies from MLP find themselves in the Pride Lands. Maybe Twilight Sparkle uses her magic to help solve a problem that the lions are facing, like a drought. She could use her knowledge of spells to bring rain.
One great Avengers - Lion King fanfiction could be where the Avengers are somehow transported to the Pride Lands. Maybe Thor is mistaken for a strange new kind of lion with his long hair and powerful physique. They could team up with Simba and his friends to fight off a new threat that is endangering both the Pride Lands and Earth, like an alien force that wants to take over all the realms.
Maybe the human boy is a lost traveler and the animals initially see him as a strange creature. But as time passes, he shows his kind heart. He could learn the ways of the Pride Lands from Simba and in return, teach the animals some simple human skills, like making a simple shelter out of branches and leaves. This would create an interesting bond between the two different worlds.
A fanfiction could also be about the hyenas getting a second chance. Maybe they find a new place to live and try to form a more positive community, with some help from the lions.
Here's a plot. There is a magical realm where inflatable sheep are the guardians. An evil force from that realm escapes to Earth. The inflatable sheep follow to stop it, but they need the help of the Avengers. The Avengers are skeptical at first but soon realize the importance of the inflatable sheep. They team up and face various challenges together, like dealing with the evil force's minions who are trying to stop them from reaching the source of the evil.
A possible plot could be a Pokemon trainer getting lost and ending up in the Pride Lands. He has to use his Pokemon to survive and also make friends with the Lion King characters.
Maybe in a fanfiction, the hyenas are cursed by a witch and they turn into lemon - colored creatures. The Lion King characters, like Mufasa in spirit or Simba, have to figure out how to break the curse. The hyenas, now in this strange state, start to have different personalities. Some become more friendly while others are more desperate to get their old forms back. This creates a complex dynamic between the lions and the hyenas.
Some great concepts for human Lion King fanfiction could involve a human being adopted by a lion pride. This human grows up with the lions, learning their language and customs. They could then use their human intelligence to come up with new strategies for hunting or defending the pride. For example, they might introduce the concept of traps to catch prey more efficiently. Another idea is a human who is a storyteller in the human world but somehow ends up in the Lion King world. The human then tells the lions stories from their own world, which inspire the lions to be better leaders or to face their fears. Also, a human with magical powers could arrive in the Pride Lands and use their powers to heal the land that has been damaged by Scar's reign.
Another possibility is a human who has a special power, like being able to communicate with all animals. They come to the Pride Lands during a time of trouble, such as a drought or an invasion from another group of animals, and use their power to help the lions and other creatures.