One idea could be to have the Infinity Armor cross over with a superhero universe. The wearer of the armor could team up with popular superheroes to fight a common enemy. Maybe they battle an interdimensional threat that only their combined powers can defeat.
One idea could be a crossover between characters from different Disney Infinity franchises in a post - apocalyptic world. For example, Jack Sparrow from Pirates of the Caribbean and Elsa from Frozen teaming up to find a way to restore their shattered universes. Another idea is to have Buzz Lightyear and Stitch on an intergalactic adventure where they have to stop an evil force that is threatening multiple Disney worlds.
Perhaps an anti - hero could be the main character. They find the Infinity Armor and initially use it for their own self - serving purposes. But as the story progresses, they start to see the bigger picture and become more heroic, using the armor to protect not just themselves but also the different worlds they encounter during the crossover.
One idea could be to have the heroes from Cartoon Network shows like Ben 10 and the Powerpuff Girls team up to fight against the forces similar to those in Infinity War. Ben could use his various alien forms to take on different challenges, while the Powerpuff Girls use their superpowers. They could also meet some of the Marvel characters and have some comical yet action - packed interactions.
One idea could be a crossover with the Harry Potter universe. The Avengers could travel to Hogwarts in search of a magical relic that could help them in the fight against Thanos. Maybe Doctor Strange uses his magic to open a portal to Hogwarts and they team up with the wizards to defend the relic from Thanos' minions.
One idea could be an armor that enhances Naruto's Rasengan. For example, it has special chakra - conducting materials that allow him to charge the Rasengan faster and with more power. Another idea is an armor that can change its form according to different battle situations, like becoming lighter for speed - based attacks or heavier for defense when facing strong opponents.
One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.
A fanfiction could also be about their childhood memories. Maybe there was an event in their past that they both remember differently, and as they talk about it, it reveals more about their characters and how they've grown over the years. It could be a heartwarming story full of family bonds and the magic of reminiscing.
One interesting concept could be the different ways the Infinity Stones interact when characters from different universes come into contact with them. For example, if a character from a magical universe like Harry Potter's world encounters an Infinity Stone, how would their magic react to its power? Another concept is how the possession of an Infinity Stone might change a character's personality or goals in the crossover. A character who was once good might be corrupted by the power of the stone.
A Thundercats and Star Wars crossover fanfiction would be really cool. The Thundercats could be in the Star Wars universe, and their unique powers and weapons could be a great addition. Maybe the Thundercats could help the Jedi or the Rebels in their fight against the Sith or the Empire. For instance, Cheetara's speed could be useful in battles, and Tygra's illusions could be used to deceive the enemy.
Another interesting concept is an oc who is not a skater initially but gets drawn into the world of 'S' because of a personal connection. Maybe they are a photographer who wants to document the amazing skating feats at 'S', and through that, they end up learning to skate themselves and becoming part of the community. They could face challenges like not being accepted at first due to not being a 'true skater', but gradually earn respect.