Their kids' personalities could be a mix of Marco and Star. They might inherit Star's boldness and Marco's determination. So they would be fearless when facing challenges and not give up easily.
I think some new characters related to the future kids could also be main characters. For example, a mentor figure for the Avengers' kids, someone who was a sidekick to the original Avengers and now has to guide the next generation. Or perhaps a non - superpowered friend of the kids who provides a different perspective and helps them in more practical ways, like coming up with strategies or providing moral support.
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.
Well, if we look at it in detail, some Avengers might be overjoyed. For example, Steve Rogers could see his future son as a continuation of his values. He might immediately start training the kid in the ways of justice and heroism. On the other hand, Tony Stark could be a bit more hesitant. He might worry about the implications of his actions on his future family. And as for Thor, he might see his future kid as a new hope for Asgard, and start teaching them about their heritage right away.
Well, there are fanfics that explore the idea of Harry Potter's kids having special powers that even their parents didn't have. In some of these fanfics, they might use these powers to solve mysteries in the wizarding world. Also, some fanfics could be centered around the kids' friendships with children of other well - known wizarding families, like the Weasleys and the Malfoys.
Maybe Ash's kids could have unique Pokémon partners that are hybrids or have special abilities. For example, a Pikachu that can fly or a Charmander with ice - type moves. This would make their journey really exciting as they explore the potential of these special Pokémon. And they could also meet some of Ash's old friends and rivals along the way, who could offer advice or challenges.
You can start by giving them distinct personalities. For example, one of Ash's kids could be really shy but extremely brave when it comes to protecting Pokémon. Then, you can show their growth through the challenges they face. If they have a fear of a certain Pokémon type at first, but later overcome it, that's a great way of development.
Well, one possibility could be that the kids from the future come back to prevent a great disaster in the present. Maybe a dark wizard that was defeated in their time has somehow found a way to be reborn in the past (the present in the story), and they need to stop it before it's too late.
Another idea is that the future kids are faced with a new threat that is a combination of old ghost enemies and a new technological menace. They have to learn to use both their ghost powers and modern technology to combat it. For example, they might use holographic devices to trap ghosts while using their in - born powers to weaken them.