Leonidas from '300' would be a great character to focus on. Imagine his reaction to the magic of the Harry Potter world. He's a fearless leader, and seeing him interact with wizards and magical creatures would be fascinating. He might see the magic as a new weapon or a strange form of sorcery that he has to either embrace or fight against.
Hermione Granger would also be very interesting. She is smart and well - read. In a crossover, she could study the culture and fighting techniques of the Spartans and find ways to combine them with magic. For example, she could figure out how to use the Spartan phalanx formation in a magical battle at Hogwarts, or she could teach the Spartans about potions to heal their wounds more quickly.
Definitely Harry Potter and Kim Possible themselves. Harry has his whole wizarding world experience and his fight against dark magic, and Kim has her crime - fighting skills and high - tech gadgets. Their different worlds and abilities would create a really interesting dynamic as they try to understand each other and work together.
Hermione Granger would also be an interesting character to focus on. She's extremely intelligent and curious. In a crossover, she would be the one trying to figure out how The Flash's powers work from a scientific and magical perspective. She might even try to find a way to combine magic and the Flash's speed for some greater good. Her inquisitive nature would make for some great interactions with The Flash and would add a lot of depth to the crossover story.
I think it would be really interesting to focus on Hermione. She's so intelligent and curious. In Middle - earth, she could study the different magic and lore there. She might be the one to figure out how to combine the magic of the two worlds. For example, she could try to find a way to use the magic of Middle - earth to defeat Voldemort or help the Fellowship in a different way.
Hermione Granger and Batman would be great to focus on. Hermione is extremely intelligent and well - read in the magical lore. Batman is a brilliant detective with a vast knowledge of various sciences and combat skills. Their interaction could be really engaging. Hermione could introduce Batman to the world of magic, and Batman could show Hermione how to use her intelligence in a more practical, non - magical way in different situations. Also, Wonder Woman and Ginny Weasley could be an interesting pair. Wonder Woman with her Amazonian strength and Ginny with her powerful magic could team up and have some great adventures together, sharing their different perspectives on heroism.
I think Harry Potter himself would be very interesting. Imagine him in Neverland, a place so different from Hogwarts. He could bring his courage and sense of justice from the wizarding world and apply it in the new setting. His magic skills would also be fascinating to see in the context of Neverland, like how he would use spells against the likes of Captain Hook or other threats there.
Definitely Harry Potter himself. His journey through time could be a way for him to gain more understanding of his parents and the events that led to their deaths. He could also try to change some things in the past to make the present better. For example, he could try to prevent Voldemort from ever becoming so powerful in the first place. And seeing Harry interact with the people from the past, like his grandparents or young Dumbledore, would be really fascinating.
I think Harry Potter himself would be very interesting. Imagining him learning tennis skills from the Prince of Tennis characters and using his wizarding abilities to add a new twist to the game. He could use his Patronus to guide the tennis ball or something like that.
I think the H2O mermaid, Rikki, could be a great focus. She's feisty and independent. If she were to meet Harry Potter, she'd probably be both intrigued and a bit skeptical of his magic. Her interactions with the wizarding world characters would be full of drama and discovery as she tries to understand this new and strange magic.
Luna Lovegood would be an unexpected but fascinating choice. Her unique perspective and belief in all kinds of magical creatures could make her very open - minded about the vampires and werewolves in the Twilight world. She might see them as just another type of magical being and try to find common ground, which could lead to some really interesting interactions and storylines.
The Joker could be an unexpected but exciting addition to this crossover. Imagine the chaos he could cause in the wizarding world. His madness and unpredictability would be a huge challenge for the wizards and witches. And Batman would have to find a way to stop him in a world full of magic, which he is not used to. Also, Snape's complex personality could add more depth to the story when interacting with Batman.