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.
Well, a plot might involve the baby being sent to the future for some reason. Natasha and Steve then have to find a way to get to the future to be reunited with their child. It could also be that the baby is kidnapped by a group who wants to study the baby's genetics to create super - soldiers. Natasha and Steve would then go on a dangerous rescue mission.
One interesting plot could be Percy trying to balance his demigod powers with the skills he might inherit from Natasha. For example, his water - based powers could interact in unique ways with Natasha's spy and combat training. Maybe he uses his control over water to create distractions during a mission, like making a sudden fog while he sneaks around using Natasha's stealth techniques.
Well, a plot could revolve around Harry inheriting Natasha's ability to read people. In the wizarding world full of secrets and hidden motives, this would give him an edge. He could sense when someone is lying or hiding something important. Also, there could be a story where the Avengers and the wizarding world have to team up because of a threat that concerns both, and Harry is the bridge between the two groups.