How about a story where a spell goes wrong in Hogwarts and transports the entire school to the Mortal Kombat realm? The students are then faced with the challenges of survival in this new, dangerous world. They form alliances with some of the Mortal Kombat characters who are initially suspicious of them but then realize they can be useful allies. The story could focus on how the students adapt their magic to the Mortal Kombat environment and how they change as they learn the ways of this new world.
One idea could be an OC who is a hybrid of two different Mortal Kombat races. They struggle to find their place in the brutal world of Mortal Kombat. Another could be an OC with a unique fighting style that combines different known styles in the game. For example, a mix of Scorpion's hellfire moves and Sub - Zero's ice powers.
One idea could be a crossover with Street Fighter. Picture Ryu facing off against Scorpion in a battle of fire and ice. Another could be a Mortal Kombat and DC Comics crossover, where Superman has to deal with the brutality of Mortal Kombat fighters. Or perhaps a crossover with the Castlevania universe, where the dark and gothic elements blend with Mortal Kombat's gore.
One interesting crossover could be the magical spells from Harry Potter being used in the Mortal Kombat arena. For example, a wizard could use the 'Stupefy' spell to stun an opponent before delivering a finishing move. Another aspect could be the Hogwarts students training in Mortal Kombat style combat to defend themselves against dark wizards.
Some fanfictions might explore the idea of a Mortal Kombat tournament taking place at Hogwarts. The various Mortal Kombat characters would bring their own brand of combat, while the Hogwarts environment would add a magical twist. The students could either be spectators or get involved in some way. This would mix the high - stakes, often gory combat of Mortal Kombat with the more whimsical and magical world of Harry Potter.
One idea could be exploring the backstories of the new characters in more depth. For example, you could write about how they got their unique powers and what their lives were like before joining the Mortal Kombat tournament.
A more detailed plot could involve Scorpion being cursed by a sorcerer. The only way to break the curse is to find a special lemon tree in a hidden dimension. Along the way, he meets new allies and enemies. As he searches for the tree, he discovers secrets about his past and the origin of his powers. This journey could be filled with battles and self - discovery, all centered around the lemon - related quest.
A possible plot for Mortal Kombat X Mileena fanfiction is her journey to discover the origin of her tarkatan side. Maybe she goes on a quest to find a cure or a way to control it better. This could lead to her encountering various characters from different realms who either help or hinder her progress. She might also have a romantic sub - plot with a character who accepts her for who she is, flaws and all.
One idea could be Raiden being transported to an alternate universe where the rules of Mortal Kombat are completely different. He has to quickly adapt and find a way back home while facing new and strange opponents. Another could be Raiden teaming up with a Mortal Kombat character he's never interacted with before, like Johnny Cage, to defeat a common enemy that threatens both their worlds. Maybe this enemy has the power to disrupt the balance of the realms, which is Raiden's main concern.
One idea could be that the characters from RWBY are suddenly thrust into the Mortal Kombat tournament. Ruby could use her scythe skills in the battles, and her speed might give her an edge. Another could be that the villains from Mortal Kombat team up with the Grimm in RWBY. They could create chaos in both worlds. Also, Yang's strength could be pitted against some of Mortal Kombat's powerhouses like Raiden or Scorpion in some epic battles.
The most interesting aspect is the clash of two very different universes. Harry Potter is all about magic, friendship, and good vs evil in a more 'fantasy - adventure' style. Mortal Kombat is known for its brutal and intense fighting. When combined, we get to see how the magic users would fare in a Mortal Kombat - style fight. For example, would Harry's Expelliarmus work against Scorpion's spear? It's really exciting to think about.