There could be a local Siberian healer who becomes an important figure in Tony's life, helping him with his pregnancy.
It's possible that there is a mysterious figure in Siberia, like a hermit or a wise old man, who has some knowledge or power that is crucial for Tony's pregnancy journey, perhaps some ancient remedies or spiritual guidance.
It could be his friends or colleagues. For instance, Pepper Potts might be there. She could be the one who helps Tony deal with the consequences of revealing the truth, or she might be one of the first to hear the truth from him. Another character could be Rhodey. He and Tony have a close relationship, and he would likely be involved in whatever situation Tony is in, especially when it comes to something as big as revealing a truth.
Well, perhaps it could involve Tony dealing with the physical and emotional challenges of being pregnant in the harsh environment of Siberia. Maybe he has to find ways to get proper medical care while being in such a remote place.
It could be a local Siberian warlord who sees Tony as a threat to his power. Maybe Tony's presence in Siberia disrupts the warlord's plans for the region, so he decides to eliminate him.
It could be a terrorist group. They might see Tony as a valuable target because of his wealth and technology.
There might be a new villain or a previously known enemy who has set a trap for Tony in Siberia. This antagonist could be a powerful figure with their own motives, like wanting to take over Stark Industries or gain access to Tony's Iron Man suits. Natasha would then have to face this antagonist to save Tony. They could have their own army or special powers that make the rescue mission more difficult for Natasha.
Steve Rogers could be in it too. He has his own relationship with Tony, and his reaction to Tony lifting the hammer would be interesting. He might see it as a sign of Tony growing as a person and a hero. And perhaps there would be some banter between them about it.
Tony and Jessie are the main characters. In this fanfiction, they are the focus, with their relationship and the situation of Jessie being pregnant at the center of the story.
Pepper Potts might appear. She could play a role in helping Tony take care of Peter, like making sure he has a proper diet and a comfortable living space in the Stark Tower. She might also be a maternal figure to Peter, giving him advice on relationships and growing up.
Pepper Potts could be one of the main characters. She might be like a guiding figure for Vision, sharing stories about Tony. Happy Hogan could also be there, maybe acting as a sort of mentor or protector for Vision. And of course, there could be other superheroes like Captain America or Thor, who knew Tony well and could have an impact on Vision's life, either by helping him or challenging him.
Perhaps in this fanfiction, Tony is kidnapped from Siberia by a powerful villain who has a long - standing grudge against him. The kidnapper could be after Tony's Iron Man suit technology. They snatch him from Siberia as it was a place where he thought he could be safe or was conducting some top - secret research related to his suit's power source. His friends then have to embark on a dangerous rescue mission.