One idea could be a story where the baby in the 'baby project' has some sort of special power that the characters have to figure out how to manage. Maybe the baby can communicate telepathically and it leads to all sorts of comical and heartwarming situations as the characters try to understand what the baby wants.
Another plot could be that the baby project is a ruse by the teachers to get Draco and Hermione to reconcile the differences between Slytherin and Gryffindor. As they take on the project, they start to understand each other's houses better. The 'baby' becomes a symbol of unity for them, and they eventually fall in love while trying to raise it in the best way possible.
Well, perhaps in the fanfiction, the baby project is a part of a bigger magical experiment. Fred and Hermione might find that the baby they are dealing with has a connection to an ancient prophecy. They then have to figure out how to raise the baby while also fulfilling the prophecy's requirements. This could lead to a lot of character development for both Fred and Hermione as they face challenges they never expected.
One idea could be exploring how Bella and Edward adjust to the new addition in their family. Maybe they struggle with protecting the baby from the vampire world's threats.
One idea could be exploring Adam's adventures in an alternate universe. Maybe in this universe, he has to team up with a different version of himself to save the day. Another could be delving into his relationship with his mother before the events of the movie in a more in - depth way.
One idea could be to explore a future where Batman Beyond has to face an old enemy from the original Batman's time that has been resurrected with new, advanced technology. This would create a clash of old and new styles of combat and detective work.
Perhaps a story where the baby malachite is a special kind of malachite that is prophesied to bring great change to its realm. Some might want to protect it while others might see it as a threat. The baby malachite then has to deal with all these different attitudes towards it. It could also be about its relationship with a wise old mentor who teaches it about its heritage and the responsibilities that come with its powers.
One idea could be a story where Baby Nightwing is discovered by the Justice League. They have to figure out how to take care of him while also protecting him from villains who might want to use him. Another could be a time - travel story where an older hero goes back in time and meets Baby Nightwing, and has to ensure his safety so that the future doesn't change.
One idea could be a story where the baby Mikaelson has unique powers that start to manifest at a very young age. Maybe they can communicate with spirits, and this leads to all sorts of adventures as the family tries to protect the baby from those who might want to use their powers.
One plot idea could be that Baby takes over Goku's body and tries to use his power to conquer the universe in a more subtle way. He might pretend to be Goku at first and manipulate his friends into doing his bidding without realizing it.
One idea could be exploring what would happen if Maleficent had a baby with a human. Maybe the baby would have a unique blend of magical and human traits, and the story could follow how the baby is accepted or rejected in both the human and magical worlds.