What could be an interesting plot for a 'Good Omens and Lucifer crossover fanfiction'?

One interesting storyline could be the interaction between the angels and demons from Good Omens and Lucifer. Maybe the characters from Good Omens end up in Lucifer's LA and have to deal with his brand of chaos. It could lead to some really funny and thought - provoking situations as they compare their different views on good and evil.

I think Aziraphale and Lucifer would be fascinating. Aziraphale is an angel who loves earthly pleasures and has a soft spot for humanity. Lucifer, being the fallen angel, would view Aziraphale's views as naive at first. But as they talk, there could be some deep - seated realizations on both sides about the nature of good and evil.

One possible plot could be that Lucifer, bored with the underworld, decides to visit the Naruto universe. He could take on the form of a powerful ninja and start causing chaos, which draws the attention of Naruto and his friends. Naruto, seeing the evil in Lucifer's actions, tries to convince him to change his ways, leading to a series of battles and philosophical debates.

Perhaps in this fanfiction, Supergirl is accidentally sent to Lucifer's world. Lucifer, intrigued by her powers and pure heart, decides to help her get back to her own world. Along the way, they face various threats together and learn from each other's moral compasses.

One plot idea could be that Aziraphale and Crowley from Good Omens get dragged into a case that the Winchester brothers are investigating in Supernatural. Maybe it's a demon that's a bit too powerful for Sam and Dean, and they need the help of the angel and demon duo who have a different approach to dealing with the supernatural. Another idea is that the two universes' versions of Heaven and Hell start to merge, and characters from both shows have to figure out how to stop it while also dealing with their own personal issues.

One plot idea could be that the characters from Good Omens and Homestuck find themselves in a shared alternate universe. The angels and demons from Good Omens might be quite confused by the strange and complex world of Homestuck, while the Homestuck characters could be intrigued by the celestial beings. For example, Crowley could team up with a Homestuck troll to outwit some overzealous angels. Another idea is a crossover where they have to solve a mystery that spans both their universes. Maybe a powerful artifact has been stolen and its pieces are scattered across both worlds, forcing the characters to cooperate despite their differences in nature and origin.

Aziraphale and Lucifer would be a very compelling pair. Aziraphale is so naive and good - natured, while Lucifer is the very essence of temptation. Their interaction could be full of tension as Aziraphale tries to resist Lucifer's wiles and perhaps even convert him. It would be like a battle of wills between the ultimate goody - two - shoes and the devil himself.

Another idea is that the Avengers' time - traveling adventures somehow cross paths with Good Omens' apocalyptic timeline. The Avengers could accidentally end up in the middle of the Good Omens' end - of - the - world scenario. They might try to use their technology and powers to stop the apocalypse in the Good Omens universe, while Aziraphale and Crowley are both amused and a bit confused by these new, powerful visitors.

One way to create an engaging plot for this crossover fanfiction is to focus on the characters' reactions to the new world they find themselves in. Imagine Dean Winchester suddenly in the middle of London and being confronted by an angel and a demon who don't quite act like the ones he's used to from his own world. His confusion and initial mistrust could lead to some interesting dialogue and action scenes. Sam, on the other hand, might be more open - minded and start asking questions about the Good Omens universe. Meanwhile, Aziraphale and Crowley are trying to figure out who these strange American hunters are. This interplay between the characters from different universes can drive the plot forward.

One interesting pairing could be Dean Winchester and Crowley. Dean has a lot of experience dealing with demons in the Supernatural world, and Crowley has his own unique charm and deviousness. Their interactions would be full of witty banter and power plays. Another pairing could be Sam Winchester and Aziraphale. Sam is the more intellectual of the Winchester brothers, and Aziraphale is an angel with a vast knowledge of the cosmos. They could have deep conversations about morality and the nature of good and evil.