It's tricky to determine. You might want to check if there are any references or background information available. If it's a common name, it could go either way - real or fictional.
Definitely not. Tony Stark and Doctor Doom are separate entities. Stark is known for his genius in technology and being Iron Man, while Doom is a powerful villain with his own complex motivations and abilities.
In the vast world of comic books, Tony Stark has never taken on the role of Doctor Doom. Their identities and roles within the comic universe remain distinct and separate.
It depends on the specific fanfiction. Some writers might envision them in a dating relationship before, while others might not. Fanfiction offers a wide range of creative interpretations.
Another theme is the idea of teamwork. Usually, they are brought together to face a common enemy or solve a big problem. This theme explores how they combine their unique skills, whether it's Tony's tech - savvy solutions and Strange's magical spells, to overcome difficulties. For example, in some stories, they have to work together to close a rift between dimensions that's leaking dangerous entities into their world.
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.