will gets possessed by vecna fanfiction

In terms of the overall plot, it could lead to a race against time. The characters will need to find a way to exorcise Vecna from Will quickly. This might involve seeking out new knowledge, perhaps from an unexpected source. Maybe an old character from the past who has some knowledge about Vecna's possession returns to help. It also opens up the possibility for new alliances and betrayals within the group as they struggle with this new situation.

Well, one possibility is that Will starts to have visions that Vecna uses to manipulate the other characters. He might show them false images of their worst fears, leading to chaos within the group. For example, he could make Eleven see herself losing her powers and being unable to protect her friends.

It depends on the creativity and plot of the fanfic author. Sometimes they might introduce such a twist, but not always.

Well, a frequent theme is the change in Dipper's personality. When possessed, he could become more aggressive or withdrawn, which creates a contrast to his usual curious and determined self. There may be a theme of redemption too. If Dipper does something bad while possessed, the story could be about him making amends once he's free. And sometimes, the fanfiction might use the possession as a way to introduce new powers or abilities that Dipper has to learn to control.

A common theme is the battle for control. Harry is constantly fighting against the possessing entity for control over his body and mind. For example, in many fanfictions, he tries to resist using dark magic that the entity might force him to do.

One of the most likely possessing entities could be Bill Cipher. He's a powerful and malevolent being in the Gravity Falls universe, and he has shown an interest in Dipper before. Another possibility is an ancient spirit or demon from the forest around Gravity Falls. The forest is full of mysteries, and it's not hard to imagine some dark entity lurking there that decides to possess Dipper.

Vecna is a powerful and mysterious villain with a complex backstory. His origins and motives are tied to dark magic and a thirst for power.

Definitely not. Vecna is purely a figment of the imagination of the creators. It doesn't have any roots in real-life events or people.

One interesting plot development could be Lloyd's struggle to regain control. As he's possessed, his friends might initially not realize it and think he's just acting out of character. Then, they gradually notice the strange behavior and start to investigate. This could lead to a race against time to save Lloyd from the possessing force.

Eleven could save him. She has psychic powers and has dealt with the Upside - Down before. She could use her powers to enter Mike's mind and fight off whatever is possessing him.