One idea could be that Loki's kids inherit his shape - shifting ability and use it to outwit the Avengers while also trying to find their place in the world. They might be initially seen as threats but then prove to be valuable allies.
One idea could be Loki's struggle to control his 'in heat' state while trying to deceive the Avengers. He might have to constantly hide his true feelings and symptoms, which could lead to some comical yet tense situations.
Well, a cool plot could be Darcy discovers a hidden power within herself while being around Loki. Loki, intrigued by this, decides to help her master it. Along the way, they face challenges from both Asgard and Earth. Maybe some Asgardians think Darcy is a bad influence on Loki and try to separate them. Meanwhile, on Earth, SHIELD is also suspicious of their alliance. It could lead to a lot of action and some unexpected friendships and romances.
One plot idea could be that Loki has been captured by a powerful new enemy who wants to use his knowledge of Asgardian magic. The Avengers find out and embark on a rescue mission. Along the way, they face various traps set by the enemy. Another could be that Loki fakes his own capture to draw out a threat that he can't handle alone, and the Avengers come to his aid not knowing it's a ruse at first.
In an Avengers future kids fanfiction, the kids could come from different planets or dimensions. Imagine Thor's kid being friends with a child from a far - off alien race. They could combine their different cultures and powers to create new strategies for fighting villains. Also, the kids might have to deal with time - travel related issues. Maybe they accidentally go back in time and have to make sure not to disrupt the timeline while also trying to learn from their parents' early days as Avengers.
One idea could be Loki's struggle to hide his condition from the other Avengers. He might be worried about how they'll react, especially Thor. Another plot could involve a character, perhaps a new Asgardian healer, trying to find a way to ease Loki's discomfort during this time.
A more complex plot could be Loki impersonating Black Widow. He infiltrates the more covert operations of the Avengers. While in her form, he could plant false intelligence, leading the Avengers into dangerous situations. He could also use her relationships with the other members, like Hawkeye, to create emotional turmoil within the team, all while trying to achieve his own goals of taking over the world or getting his hands on powerful magic items.
In a fanfiction scenario where the Avengers meet Loki's kids, there could be a whole range of possibilities. Maybe the kids are initially distrusted due to Loki's past actions. But if they show their own individuality and good intentions, some Avengers might be open to giving them a chance. For example, Thor might be more willing to accept them as his nephews or nieces, while others like Tony Stark would be very cautious.
Maybe the Avengers are trying to prevent a powerful artifact from being misused. Loki, who has a history with artifacts, offers his assistance. He might do this to gain some sort of favor from the Avengers or because he realizes the consequences of the artifact falling into the wrong hands. In the fanfiction, he could use his trickery to steal the artifact back from the villains before they can use it.
A plot could involve Loki using his agent skills to manipulate the Avengers into a false sense of security. He then reveals a master plan that involves using their own powers against them to take over Earth. But in the process, he starts to have second thoughts as he gets to know the Avengers better and forms unexpected friendships. For example, his interactions with Black Widow could lead to him seeing the value in human relationships.
The Avengers' interaction with Loki's kids in fanfiction would be complex. Thor, being Loki's brother, might have a more nuanced view. He could try to guide the kids towards the right path. Iron Man, on the other hand, would likely use his technology to keep an eye on them. And the female Avengers like Scarlet Witch might try to empathize with the kids if they seem lost or confused. There would be a mix of suspicion, hope, and attempts at understanding in these interactions.