What are some interesting ideas for a 'Lucifer crossover Supernatural' fanfiction?

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.

One idea could be to explore a world where the characters from 'Lucifer' and 'Arrow' are forced to team up to stop a common supernatural threat that is beyond the capabilities of either group alone. For example, a powerful demon that is using advanced technology to cause chaos in both their worlds.

One idea could be that Lucifer, with his charm and manipulative skills, gets involved in the power struggles among the Autobots and Decepticons. He might try to use their war for his own amusement or to gain some sort of power. For example, he could offer a deal to Megatron to help him defeat the Autobots in exchange for something valuable in the underworld.

The clash of different mythologies. 'Lucifer' has its own take on the devil and the afterlife, while 'Supernatural' has a vast array of demons, angels, and monsters. When these two universes collide in a fanfic, it creates a really interesting dynamic.

One great piece is 'The Devil's Alliance'. It combines the dark allure of Lucifer from 'Lucifer' with the spooky world of 'Supernatural' in an interesting way. The characters' interactions are well - written and it keeps you on the edge of your seat.

One idea could be that the Winchester brothers are on a hunt in a small town where Hannibal Lecter has set up his practice. They initially suspect him of being a monster, but as they dig deeper, they realize he's a different kind of evil. Another could be that Hannibal gets intrigued by the existence of demons and angels in the Supernatural universe and tries to study them. He might even team up with the Winchesters in an uneasy alliance to take down a greater threat.

One idea could be that the Winchesters end up in Smallville while hunting a demon that has some connection to LuthorCorp's experiments. Maybe the demon is using the kryptonite there for its evil deeds. Another could be that Clark Kent discovers the existence of the supernatural world through Sam and Dean. He could initially be skeptical but then realize there are threats that even his powers might not be enough to handle.

Redemption is often explored. In Supernatural, many characters are on a journey of redemption, and when Lucifer is added to the mix, the idea of whether he can be redeemed or not becomes an interesting plot point. For example, some fanfictions show Lucifer being influenced by the Winchesters' sense of justice. Another common theme is the disruption of the natural order. Lucifer's presence in the Supernatural universe throws a wrench into the already complex balance of good and evil, heaven and hell, that exists in the series. This can lead to all sorts of chaos and interesting story developments.

One common theme is the clash of powers. Lucifer has his own set of demonic powers and in the Supernatural world, there are various powers like the Winchester brothers' hunting skills and the angels' powers. So, how these powers interact is often explored.

Power struggles are common. Both shows deal with powerful beings, so in the crossovers, there's often a fight for dominance between the characters from each universe.