One idea could be that Coulson and May had a secret relationship in the past and Skye was the result. They hid her away to protect her from the dangerous world they were in. As Skye grew up, she started to show signs of extraordinary abilities, which led to her being discovered by SHIELD. Coulson and May then had to face their past and decide how to be part of Skye's life while still protecting her.
Nick Fury should be in it. As the head of SHIELD, he would have an interest in Skye. He could be the one who discovers the truth about Skye being Coulson and May's daughter and then try to use her for his own purposes. This would put Coulson and May in a difficult position of having to protect Skye from Fury while also trying to figure out how to be a family.
One common theme is friendship. Since Coulson and Skye are part of the same team, many fanfics explore how their friendship grows and deepens over time. They support each other through tough situations and share a bond that is unique within the team.
One great Coulson - Skye fanfic is 'The Bond Between Them'. It beautifully explores their relationship within the framework of the story's universe. It delves deep into how they support each other during difficult missions and how their friendship evolves over time.
Well, it could involve Coulson and May adjusting to life outside the Framework. Maybe they're dealing with the after - effects of the experiences they had in that virtual world, like trauma or changed relationships.
One possible plot could be that Skye and May are on a mission together. They encounter an unexpected enemy that challenges their skills and teamwork. Maybe they have to rely on each other's unique abilities to get out of a tough situation.
There are also fanfics that suggest her parents were SHIELD agents themselves, who had to give her up for some mysterious reason. Maybe they were involved in a dangerous experiment and didn't want Skye to be in harm's way. So they hid her away until she was found by Coulson and his team.
Well, Tumblr can be a great source too. There are many fanfic writers who post snippets or links to their full works on their blogs. Just search for relevant tags like '#AgentsOfShield #MayCoulsonFanfic'. Also, some Facebook groups dedicated to Agents of Shield fans might have members sharing their favorite fanfics about May and Coulson.
Another plotline could involve the three of them facing an external threat together. Since Natasha and May are agents, they are bound to have enemies. Skye, with her hacking skills, could be a valuable asset in helping them defeat the bad guys. This adventure could strengthen their bond as a family. They might also face some moral dilemmas during this, which could further develop their characters.
Characterization is key. A great fanfic will have May and Coulson's personalities spot - on. For example, May's stoicism and Coulson's leadership and sense of humor should be well - represented. Also, a good plot that fits within the world of Agents of Shield, like a mission that only they can handle together or a mystery from their past that resurfaces.
It could be about Coulson somehow ending up in Lucifer's world. Maybe he's there to investigate something strange and crosses paths with Lucifer. They could end up working together to solve a mystery that involves both the human and supernatural elements of Lucifer's world.