Well, it could start with a magical accident that somehow links Harry Potter's world to Victor von Doom's. Harry, being the hero he is, might initially be mistaken for a threat by Doom. As the story progresses, Harry realizes that Doom's actions are causing chaos in both worlds. He then uses his knowledge of magic and his wits to try and convince Doom to stop. Along the way, there could be battles, both magical and technological, and Harry might even learn some new skills from Doom's world while trying to find a solution to separate the two universes again.
Well, it's hard to say it's popular. Harry Potter is a well - known magical world with its own set of characters and stories, and Victor von Doom is from the Marvel universe. The two have different tones and mythologies. So, this 'fanfiction' idea might be something only a small number of creative fans would explore.
Victor Von Doom is one of the most notorious antagonists in comics. His ego and ambition lead him to take on the heroes, using his technological and magical prowess. Despite his villainous nature, he has a certain charm and depth to his character.
Perhaps in a fanfiction, Dr Doom is actually a distant relative of one of the wizarding families in the Harry Potter universe. He discovers this connection and decides to use it to his advantage. He could try to manipulate the wizarding politics to gain more power, all while Harry Potter and his friends are suspicious of his motives and try to stop him.
Well, it works by mixing the two distinct universes' elements. For instance, the magic from Harry Potter and the extreme combat scenarios from Doom. The fanfic writers might give Harry Potter the ability to use Doom - like weapons or give Doomguy some magical powers. It creates a really unique and exciting blend.
One interesting Doom Harry Potter fanfiction could be where the dark and gritty atmosphere of Doom seeps into Hogwarts. For example, a story where Harry has to face demons in the Forbidden Forest that are a result of some dark magic gone wrong, similar to the threats in Doom. Another could be about a crossover where Doomguy somehow ends up in the wizarding world and teaches the students some unorthodox ways of combat.
There might be a story where Harry Potter, using some of the power - up items from Doom, battles against Voldemort. For example, he could get the BFG (Big Fucking Gun) in a magical way and use it to take on the Death Eaters. This would be a really wild and action - packed fanfiction.
The themes can be combined by having the sense of impending doom from the Doom game be present in the Harry Potter universe. For instance, the constant threat of the demons in Doom can be equated to the threat of Voldemort and his Death Eaters in Harry Potter.
Well, in the world of fanfiction, all kinds of crossovers are possible, but 'Harry Potter is Doctor Doom fanfiction' is rather strange. Fanfiction usually involves some sort of connection or transformation within the same general genre or universe. Harry Potter's magic system and the nature of Doctor Doom's character and his world are so disparate that it's hard to imagine a large following for such a concept. It might exist in some very creative and out - there corners of the fanfiction world, but it's not likely to be a big hit.
One possible plotline could be that Harry Potter somehow gets transported to the Marvel universe and, through some strange magic - technology fusion, takes on the characteristics of Doctor Doom. He might start using his newfound powers and knowledge to try and rule Hogwarts in a more tyrannical way, much like Doctor Doom rules Latveria.