What are some interesting Cortana crossover fanfiction ideas?

One plot idea could be Cortana getting trapped in a virtual reality world created by a rogue AI. She has to fight her way through various digital obstacles and enemies while trying to find a way back to the real world. Another idea is that Cortana discovers a long - lost part of her code that gives her new abilities and she uses these to protect humanity from a new threat. Maybe Cortana could also time - travel to different points in the Halo universe's history and change certain events to save more lives.

One idea could be a crossover where the characters from RWBY end up in the Halo universe. They might team up with John and Cortana to fight a common enemy, like a new type of Grimm that has somehow made its way into the Halo world. Another plot could involve the sharing of technology or powers between the two groups. For example, Ruby's scythe skills could be combined with John's combat training to create a unique fighting style.

One plot idea could be that Cortana and Dr Halsey work together to solve a mystery within the Halo universe. Maybe there's a malfunction in some ancient Forerunner technology that they need to figure out before it causes chaos. They could use their combined knowledge of AI and scientific research to crack the problem.

Maybe Naruto discovers Cortana's existence while on a mission in a strange dimension. He is intrigued by her digital form and her ability to store vast amounts of information. Cortana, in turn, is fascinated by Naruto's determination and the concept of chakra. They form an unlikely alliance to face new threats that are emerging in both their worlds.

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 cool 'ff7 crossover fanfiction' idea could be to cross it with the 'Star Wars' universe. Picture Sephiroth as a Sith Lord, with his powerful abilities and dark charisma. He could face off against Jedi Knights. Or perhaps Aerith could befriend some of the more force - sensitive characters in the Star Wars universe. Another option is to crossover with the 'Mass Effect' series. The technology in Mass Effect could be an interesting contrast to the more magic - based elements in FF7. Characters like Tifa could interact with the alien species in Mass Effect.

One idea could be a crossover with the One Piece world where Kuzan teams up with the Straw Hat Pirates to face a new and powerful enemy. Maybe they encounter a threat that requires Kuzan's ice powers and the Straw Hats' unique skills combined. Another could be a crossover with a modern - day superhero universe, and Kuzan uses his abilities in a city - scape setting, like freezing over a rampaging villain's lair.

One idea could be a crossover with 'Alien'. The prawns from District 9 could encounter the xenomorphs. Maybe the prawns' advanced technology could be used to fight the deadly aliens, or perhaps there could be a misunderstanding and they initially think the xenomorphs are another form of prawn. It would be a wild mix of two different alien concepts.

One idea could be an Elaine crossover with a fantasy world. Imagine Elaine from her original setting suddenly finding herself in a magical realm filled with elves and wizards. Another could be a crossover with a detective story, where Elaine uses her unique charm and smarts to solve mysteries in a noir - like city. Or perhaps a crossover with a historical period, like the Victorian era, and seeing how Elaine adapts to the strict social norms and different fashion of that time.

One idea could be a crossover between two popular Planeswalkers, like Jace and Liliana. They could team up to face a new, powerful threat that neither could handle alone. This would bring out their different personalities and magic styles.