It's hard to say exactly. But it might cause the Doctor's personality to change or give them new abilities and challenges to overcome. It all depends on the author's imagination!
Often, when Rory is hurt in fanfiction, it triggers a series of events that test the relationships among the Doctor and the companions. It might also bring out hidden strengths or vulnerabilities in Rory himself.
When the companions meet in fanfiction, it often opens up new plotlines. They could discover hidden secrets about the Doctor or uncover a threat that only they can stop together.
In this fanfiction, after Stiles gets bitten by a vampire, he might find himself in the middle of a vampire war. The vampire who bit him could belong to one faction, and now the other faction sees Stiles as a threat or a tool. He has to learn about vampire politics and hierarchies quickly. His friends, especially those who know about the supernatural, would try to protect him. Stiles would also have to deal with the physical and emotional changes that come with being a vampire, like the isolation that can come from living a nocturnal life and the fear of hurting those he loves.
It could lead to a wild adventure as his companions race to save him. Maybe there's a villain with a specific motive behind the kidnapping.
It could lead to all sorts of interesting interactions. Maybe they team up for an adventure or have some misunderstandings to sort out.
It could lead to all sorts of adventures. Maybe the Doctor has to rely on his companions more or find unique ways to solve problems with his limited mobility.
It's a wild and imaginative plot twist! The creation of a baby by the TARDIS could lead to all sorts of adventures and challenges for the Doctor.
It could lead to all sorts of adventures and unexpected plot twists. Maybe there's confusion at first but then they team up to save the universe!
It can lead to all sorts of interesting plot developments. Maybe the pregnancy brings unexpected challenges or new allies.
Often, it leads to emotional turmoil for Rose and the Doctor as they face unknown challenges. There might also be interference from various villains or time paradoxes.