Perhaps Daenerys comes to Winterfell seeking refuge from the approaching White Walkers. The people of Winterfell are initially hesitant to welcome her, but as they see her determination to fight the common enemy, they start to accept her. Daenerys then discovers some ancient secrets in Winterfell's crypts that could potentially help in the battle against the undead. Her dragons also start to interact with the magical elements in the North in strange and unexpected ways.
Daenerys in Winterfell would disrupt the existing power dynamics in multiple ways. For one, her very presence as a Targaryen with a claim to the throne challenges the Stark's authority in the North. Her dragons are a huge factor; they could be used to intimidate or be seen as a great asset. This might lead to some characters trying to manipulate her for their own gain. For example, Littlefinger (if he were still alive) might try to play both sides, using Daenerys against the Starks or vice versa. Also, the common people in Winterfell would be divided in their opinions of her, some seeing her as a savior and others as a foreign invader.
Power and influence. If a character can assert their authority over Winterfell, whether through political maneuvering like Sansa did in the show, or by being a forceful military leader, she could be seen as the real lady. For example, if a character rallies the troops of Winterfell against invaders and is successful, that would give her a strong claim.
Well, a 'bastard of Winterfell fanfic' could be about the story of a character who is a bastard in Winterfell. It might explore their struggles, their relationships within the Winterfell society, and how they try to find their place. Maybe it focuses on their journey of self - discovery, facing the prejudice that bastards often face in the world of Westeros. It could also involve their adventures, like getting involved in battles or political intrigues within the context of Winterfell.
In many 'Game of Thrones' fanfics, different characters could be considered the 'real' lady of Winterfell. It could be Sansa Stark, as she has a strong claim to Winterfell through her Stark heritage. She has endured a great deal and learned the ways of politics, which would make her a worthy lady of the keep.
Well, a simple idea could be that the pregnancy is a secret at first. Only a few close allies know. Jon and Daenerys have to be very careful to keep it that way. They might have some close calls where the secret almost gets out, adding a lot of tension to the story.
Family is a very common theme. Since the Starks are a large and important family in Winterfell, many fanfics explore their family bonds, loyalty, and rivalries. Another common theme is survival, especially during the harsh winters that Winterfell often faces.
It's hard to say exactly without reading the fanfic, but it could be the bastard character themselves. Maybe they are the central figure around which the whole story unfolds. There might also be other important characters like the lord or lady of Winterfell who have an impact on the bastard's life, either by showing kindness or being cruel.
One possible storyline could be Tony Stark bringing his technological genius to Winterfell. He might start by upgrading their defenses. For example, he could create some sort of energy shield around the castle, similar to the one he had in Stark Tower. This would protect Winterfell from the White Walkers and other threats. He could also work on improving their weapons, making swords and arrows with some advanced alloys he developed. Maybe he'd even introduce some basic robotics to help with tasks like scouting or carrying supplies. Another aspect could be his interactions with the characters there. He'd probably get along well with Bran, as they both have a deep understanding of different forms of knowledge. Stark could share his knowledge of the outside world with the people of Winterfell, and in return, learn about their ancient ways and magic.
In many 'Game of Thrones' fanfics, the Lady of Winterfell could refer to Sansa Stark. She had a complex journey in the series and in fanfics might be depicted as a strong leader ruling over Winterfell. She learned the hard ways of politics and survival, which would make her an interesting focus in fan - created stories.