Well, one consequence could be that his life - support system is affected. Since the arc reactor was keeping him alive in some ways, without it, he might face immediate health risks. He could start to experience weakness and his heart might struggle without the power source the arc reactor provided.
The arc reactor in fanfiction about Tony Stark is a really cool concept. It can be used to show the evolution of Stark's character. At the start, it might be just a technological marvel for powering his suit. But as the story progresses in the fanfic, it could become something more spiritual or emotional for him. It might represent his connection to his past, his father perhaps, and his journey to become a better hero. And the way different authors play with this idea in their fanfictions is really fascinating.
There could be a focus on his relationships. With this big change in his life, his friends and colleagues like Pepper, Rhodey, or the other Avengers might react in different ways. Some might be worried about his health, while others might be concerned about how it affects their team dynamics.
The arc reactor in fanfiction involving Stephen Strange can also be a source of conflict. Some might write that the energy from the arc reactor is disrupting the magical balance that Strange is trying to maintain. This could lead to a tense relationship between the two characters at first, but as the story progresses, they could find a way to work together to either control or utilize the arc reactor's power in harmony with magic.
Another fanfiction could focus on an alternate universe where the arc reactor was not invented by Tony Stark, but by someone else. It could explore how different the world would be in terms of technology, politics, and superheroes without Tony having his signature power source.
Tony Stark himself is obviously a very popular character. He is the central figure associated with the arc reactor, and fanfictions often revolve around his experiences, emotions, and adventures related to it.
The arc reactor in Tony Stark fanfiction can also be a source of inspiration. Other characters might look at it in awe and be motivated to pursue their own scientific or heroic endeavors. It can be the centerpiece of a story about how Stark's technology influences those around him, not just in terms of its practical applications but also in terms of the hope and wonder it represents.