The sorceress Sindel could also be a main antagonist. She may believe that the relationship between Johnny and Mileena goes against the natural order of things. She could use her powers to create illusions and misunderstandings between them. Also, she might be trying to protect some ancient Outworld secret that she thinks Johnny Cage is getting too close to through his relationship with Mileena.
For 'johnny cage x mileena fanfiction', a plot might be that Johnny Cage is filming a movie in Outworld as a sort of 'behind - the - scenes' look at the realm. He meets Mileena, who is initially hesitant about being in the movie. But Johnny's charm wins her over. As they work on the movie project, they find themselves in dangerous situations, like attacks from other Outworld creatures. Through these experiences, they grow closer. Mileena shows Johnny a side of Outworld he never knew, and he shows her the lighter side of Earthrealm. Their relationship then develops into a love story that defies the differences between their two worlds.
His character could also be developed through learning new fighting styles. In the crossover, he might encounter a Mortal Kombat master who teaches him a more disciplined and deadly form of combat. This not only makes him a more formidable fighter but also changes his attitude towards fighting. He becomes more respectful of the Mortal Kombat traditions and incorporates them into his own flamboyant style.
One possible plotline could be that they meet during a tournament. At first, they are rivals, but as they face stronger opponents together, they develop a bond. Another could be that Mileena is on a mission and Cage accidentally gets involved. They are forced to work together to survive, and in the process, feelings emerge.
Another place could be FanFiction.net. There are many Mortal Kombat - related fanfics on this site, so it's worth a search for the 'johnny cage x raiden fanfic' you're interested in. Just be aware that the quality and content can vary widely.
One popular 'johnny cage x raiden fanfic' story could be about their unexpected team - up in a battle against a common enemy. In this fic, Johnny Cage's brash and showy fighting style might contrast with Raiden's more reserved and powerful moves. They could start off not getting along but gradually develop a mutual respect as they face challenges together.
Batman could be another interesting crossover. Batman's dark and brooding nature would contrast with Cage's more flamboyant style. They could be forced to team up to solve a mystery that involves some sort of magic or otherworldly elements, which would be new territory for Batman and something Cage is more used to in the Mortal Kombat realm.
How about a crossover with the 'Teenage Mutant Ninja Turtles'? Johnny Cage could end up in New York City's sewers and meet the turtles. He'd be initially shocked but then impressed by their ninja skills. They could all work together to stop Shredder from getting his hands on some powerful ancient artifact that Cage was also after.
The OC could be a healer from a far - off land. Mileena gets injured during a battle and the OC finds her. At first, Mileena is suspicious and hostile, but the OC's gentle nature and skill in healing start to change her attitude. The OC stays with Mileena to make sure she fully recovers. During this time, they learn about each other's cultures and beliefs. Mileena shows the OC the harsh realities of her world, and the OC shows Mileena the beauty of compassion. Their bond grows as they face various challenges together within Mileena's domain.
Well, it could be a story full of action - packed encounters that gradually turn into romantic moments. Maybe Cage is initially intrigued by Mileena's fierce and mysterious nature. As they are forced to team up against common enemies, they start to see each other in a new light. Cage might be the one to break through Mileena's tough exterior, and they could share some tender moments in the middle of all the chaos in their world.