A possible plot is that Natasha's secret wife is from a different dimension. They got married during one of Natasha's missions in that dimension. The wife then follows Natasha to this dimension, but her presence starts to cause glitches in the fabric of reality. The Avengers must then figure out how to deal with this situation without losing Natasha's relationship.
Another plot could revolve around the secrecy itself. Natasha has kept her wife a secret not because she doesn't trust the Avengers, but because her wife was once an enemy agent who has now reformed. The story could be about how the Avengers gradually discover the truth and learn to accept Natasha's relationship and her wife's new identity.
She could be a super - spy too, but on a different side initially. Maybe she was brainwashed by a shadowy organization. Natasha then has to fight her sister while also trying to bring her back to her senses. It would be a story full of action and emotional turmoil.
A third plot could be Natasha dealing with the physical and emotional changes during pregnancy. Since she's a trained assassin, she might find it difficult to slow down and take care of herself. Steve, on the other hand, could be overly protective, which might cause some minor conflicts between them as they navigate this new chapter of their lives.
A plot could revolve around a kid Natasha joining the Avengers on a time - traveling adventure. They go back in time to stop an event that could change the future of the Avengers. Along the way, Natasha has to use her wits and natural skills to overcome various obstacles, and she forms a special bond with the other Avengers members during this journey.
One interesting plot could be the animal avengers having to deal with a new villain that can control the weather. The animals would have to use their unique abilities, like the birds flying into the eye of the storm to disrupt the villain's control. Another plot might involve the animal avengers trying to protect their forest home from humans who want to cut it down for development. They could form alliances with other forest creatures and use their wits to outsmart the humans. And there could also be a plot where the animal avengers discover a magical item in the forest that gives them new powers, but they also have to face the danger of it being stolen by an evil group of animals.
Perhaps in this fanfiction, there is a new member who has the power to heal emotional wounds. The Avengers initially don't trust this new person, but as they face challenges that test their mental and emotional strength, they come to realize that this new member is crucial to their team. This new member helps them deal with their past traumas and makes the team stronger than ever.
One interesting storyline could be them teaming up for a secret mission. Wanda could use her powers to manipulate the enemy's minds, Clint with his archery skills could take out foes from a distance, and Natasha's combat and espionage skills would keep them one step ahead. Maybe they are sent to infiltrate a powerful criminal organization that has been causing chaos in the world. They have to rely on each other's unique abilities to succeed.
One great 'Avengers Natasha Romanoff Guilty' fanfiction could be about her feeling guilty for a mission gone wrong that led to civilian casualties. In it, she might struggle with her self - worth and her place in the Avengers.
In a body switch fanfiction, Thor and Hulk could switch. Thor in Hulk's body would be a wild sight. He'd have to control the Hulk's rage, which is completely different from his godly power. Hulk in Thor's body might accidentally summon Mjolnir with his brute strength, or have some really funny misunderstandings when interacting with Asgardians. This kind of body switch can create a lot of chaos and humor within the Avengers team.
One interesting plot could be Spiderman getting caught in the middle of an Avengers' internal conflict. Maybe there's a disagreement among the Avengers about how to handle a new threat, and Spiderman has to use his unique perspective and abilities to try and bridge the gap. For example, Iron Man might want to use high - tech solutions that could endanger civilians, while Captain America is more focused on protecting the people first. Spiderman, being a street - level hero, can relate to both sides and tries to find a compromise.
A common plot is the Avengers protecting Peter from his enemies who now see him as an easy target because he's associated with the Avengers. For instance, some of Spider - Man's classic villains might team up to take him down. The Avengers then have to use their combined skills and powers to keep Peter safe. This not only shows the Avengers' loyalty to Peter but also how Peter learns from them in the face of danger.