It might be because of the rhythm and intonation. Sometimes, even if the words don't make literal sense, the way they flow when spoken aloud can give an illusion of correctness.
Well, without reading it specifically, it could be about Naruto in a scenario where he becomes the champion in a context related to Raiden. Maybe it involves Naruto facing challenges in a Raiden - inspired world or having to prove himself worthy of some sort of Raiden - related title. It could also potentially involve Naruto using powers or abilities associated with Raiden.
The length of the Raiden Shogun story quest can be quite subjective. On average, it might take around 3 to 5 hours. However, if you take your time to enjoy the cutscenes and dialogue fully, it could extend longer.
The OC could be designed with a strong sense of justice, just like Raiden. For example, if the OC is a human, they could be a warrior who has always fought for the rights of the oppressed. This would align them well with Raiden's mission to protect Earthrealm. Their moral compass would be in sync, which would make their interactions more believable and natural.
One possible plot could be that Naruto, being from his ninja world, somehow gets transported to Raiden's universe. He could be in awe of Raiden's power which is so different from chakra. Naruto might try to learn from Raiden about his abilities and fighting style. And Raiden could be intrigued by Naruto's never - give - up attitude and his ability to make friends so easily. They could team up against a common enemy that threatens both their worlds.
Well, Naruto is surely one of the main characters since it's in the title. As for others, it could include characters from the Naruto universe like Sasuke, Sakura, Kakashi, etc. depending on how the story is set up. And there might be new characters introduced that are related to this Raiden concept, perhaps a Raiden - like figure who is an important part of the plot.
Dark Raiden's story is quite complex. He started as Raiden, the protector of Earthrealm. However, after seeing so much violence and the constant threat to Earthrealm, he became darker. He decided to take more extreme measures to protect his realm. He was tired of the rules that seemed to be constantly exploited by the enemies. This led him to make some very controversial decisions, which put him at odds with some of his former allies.
It's a fictional concept. Harry Potter and Raiden are from two completely different fictional universes. Harry Potter is a wizard in the magical world created by J.K. Rowling, while Raiden is a character from the Mortal Kombat series. Combining them in the idea of 'fanfiction' is just a creative and very unlikely mash - up in the realm of fan - created ideas.