supernatural batman crossover fanfiction

One idea could be that the Winchester brothers from Supernatural are investigating a series of strange murders in Gotham City. They cross paths with Batman who initially is suspicious of them. Eventually, they realize that a demon is behind the killings and they team up. Batman provides his detective skills and combat abilities while the Winchesters use their knowledge of the supernatural to defeat the demon.

Well, for the characters' interaction, focus on their goals. Batman's goal is to protect Gotham, and the Winchesters' is to hunt down the supernatural. When they interact, these goals can either clash or align. For instance, if there's a supernatural threat in Gotham that the Winchesters are after but Batman doesn't fully understand the nature of it yet. There will be some tension as Batman tries to maintain his control over the situation in his city. But as they communicate, they can find common ground. You can also use their different ways of speaking. Batman is more formal and the Winchesters use a lot of slang, which can create interesting dialogue exchanges.

How about Gollum from Lord of the Rings? It seems really odd at first, but think about it. Gollum's sneaky nature and knowledge of dark places could be useful in Arkham Asylum. Batman could try to control Gollum's greed and use his skills to navigate the more dangerous parts of the asylum. And Gollum might be fascinated by Batman's shiny gadgets. It would be a very strange and interesting dynamic.

One idea could be that the NCIS team is investigating a series of strange murders that seem to have a supernatural element. They end up calling in the Winchesters from Supernatural for help. The two groups initially clash due to their different methods but eventually learn from each other and solve the case together.

One idea could be that Lucifer from 'Lucifer' enters the world of 'Supernatural'. Maybe he teams up with the Winchester brothers to fight a common enemy, like a new type of demon that is causing chaos in both their realms. He could use his devilish charm and powers in a way that the Winchesters are both skeptical and intrigued by.