Who could be the main antagonist in 'harry is a stark fanfiction'?

It could be a future version of himself that has become corrupted by power. He sees this future self causing chaos and destruction, and has to find a way to stop his own dark path. Maybe it's a result of his technology getting out of control and warping his mind.

It could be the sister herself in a sense. Her over - the - top fan behavior might cause so many problems that she becomes like an antagonist to the normal, smooth - running of the Stark family and the superhero world around them.

It could be an alternate - version of Tony Stark from a different timeline who has gone rogue. This version might have different values due to the differences in his timeline's history and is now causing problems in the main Stark's timeline.

It could be a corrupt prison warden who has a personal vendetta against Harry. This warden might make Harry's life in prison extremely difficult and try to prevent him from ever getting out, even if he's innocent.

A power - hungry noble could be the main antagonist. This person might be jealous of the Queen's position and wants to overthrow her, and sees Harry as an obstacle in his way.

A new dark wizard who has emerged from the shadows, someone who idolized Voldemort and is trying to pick up where he left off. This antagonist could be using new and more insidious magic that Harry has to figure out how to combat as an Auror.

Perhaps Voldemort himself, even though he doesn't have the natural ability to shapeshift in the original story. In the fanfiction, he could find a way to mimic shapeshifting, or he could use dark magic to control other shapeshifters to go against Harry. This would make for an even more dangerous and complex conflict as Harry has to face his greatest enemy with this new aspect of his powers.

A power - hungry merman who wants to rule over all the mer - people. He sees Harry as a threat because Harry has some special powers or a claim to the throne that he doesn't want to share.

It could be a rival company's spy. They want to steal Stark Industries' secrets during the field trip. Maybe they disguise themselves as a tour guide or an intern to get close to the valuable information.

There could also be new antagonists. For example, some of the more traditional wizarding families who are against the idea of a female Harry. They might see her as a threat to the old - fashioned ways of the wizarding world and try to undermine her.