Another interesting plot could be a love story. Picture a character from RWBY falling in love with a character from Shuumatsu no Valkyrie. This would face many challenges, such as the differences in their worlds, cultures, and the fact that they are both often in the middle of dangerous situations. But their love could be a force that brings their two worlds closer together.
It's about a battle royale - style setup where gods from different mythologies battle against humans. The Valkyries play a role in setting up these battles.
First, you need to understand the characters from both series well. Know their personalities, their backstories, and their goals. This will help you write them in a way that is true to their original selves. For example, Ruby from RWBY is very optimistic and determined, while Thor from Shuumatsu no Valkyrie is strong - willed and confident in his power.
Well, one interesting plot point could be how the Valkyries' unique abilities are incorporated in the fanfiction while reading the story. Maybe they use their powers to influence the outcome of the events in the story they are reading.
If you like novels like the Enen Witch, I can recommend some similar works. For example," Mad Concubine: Wolf King's Strange Ways to Chase His Wife " and " Wolf King's Pet Princess Consort " were ancient romance novels similar to " Wolf King's Contracted Concubine." In addition, if you like novels about time travel, you can read The Fierce Wife Is in Power: Don't Think of Running Away, General, and My General's Wife Is Afraid. These novels all have wonderful plots and attractive writing styles. I hope you will like them.
Since we don't have much information about this specific'shuumatsu visual novel', it could be about various things. It might be a fantasy - based story set at the end of a magical age. The characters could be dealing with the decline of magic and having to adapt to a new world order. Or it could be a psychological exploration where the 'end' is more of an internal state for the characters, such as the end of their beliefs or values, and the visual novel follows their journey of self - discovery and transformation in the face of this internal 'end'.
Their interaction would be tense at first. Young Kratos, full of energy and unbridled aggression, might see old Kratos as a threat or an obstacle. Old Kratos, on the other hand, would be more reserved and cautious. But as they start to communicate, they would find common ground in their shared past and their connection to their family.