Some fanfictions might make it an unexpected character. For instance, a female superhero from another universe who somehow crosses paths with Tony Stark and they end up having a baby. This would open up all sorts of new story possibilities, like dealing with different cultures and powers.
It could be a goddess from Norse mythology, like Sif. Since Tony has had interactions with Asgardians before, it's not a stretch to think that he could have a relationship with a goddess. Their union could result in a demigod child with powers related to both technology and godly abilities.
Pepper Potts could be a big help. She knows Tony so well, and she could try to jog his memory by showing him things from their past together, like pictures or mementos. Rhodey could also be there for him. He could tell Tony stories about their military days and how they became friends, which might trigger some memories.
One interesting storyline could be how Tony Stark balances his superhero duties with fatherhood. He might have to invent new gadgets to keep his baby safe from his enemies. For example, a high - tech baby monitor that can also detect any approaching threats.
In this fanfiction, the mother could be a powerful sorceress. She used her magic to create a baby with Kratos' essence for some grand purpose. But then she disappeared, leaving Kratos to deal with the baby. This would add an interesting layer of mystery to the story as Kratos tries to figure out why she did it and what the baby's true nature and purpose are.
Perhaps it could be a character from an alternate dimension. In some fanfiction scenarios, portals open between different dimensions, and Spiderman could have had an encounter with a female character from another world, which led to the baby.
It could be someone from Stiles' past that he had a brief relationship with. Maybe a girl he met during a summer vacation or a girl from another town that he had a fling with and then lost contact with until she shows up with the baby.
Another option could be an original character created just for the fanfiction. This gives the writer a lot of freedom to create a character with unique traits and a backstory that fits the plot they have in mind for Draco and the baby.
It could be Hinata. Since they got married in the original series, it would be a natural choice for her to be the mother in the fanfiction.
Pepper would be a likely candidate. She has a close relationship with Tony already, so she'd probably step up and take care of him. She has experience dealing with Tony's antics, so she could handle baby Tony's needs too.
In such a fanfiction, it might show Steve and Tony's journey towards having a baby. It could involve some kind of magical or scientific element that allows them to have a child together. The story could focus on how they adapt their lives to include this new addition. Steve might be the more traditional and protective parent, while Tony could be the one with all the high - tech baby gear. Their baby could inherit some of their amazing traits, like Steve's strength or Tony's intelligence.