The injury could introduce new characters. Maybe a healer Wesen shows up to help Nick. This new character could bring in new plot elements and relationships. Also, it might change Nick's perspective on his role as a Grimm. He could start to question if he's putting himself in too much danger and how it affects those around him. This internal conflict can drive the storyline in different directions.
One major consequence could be that his enemies might take advantage of his weakened state. They could try to finish him off or gain some advantage over him. On the other hand, it could also inspire the good Wesen in the community to come together and protect him. This injury might also affect his work as a Grimm. He may have to take a break from fighting the bad Wesen, which could lead to an increase in their activities in the short term.
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.
It can introduce a sense of drama. When Gohan gets hurt, it makes the readers worry about his fate. This can create suspense as they wonder if he will recover in time to face future challenges.
In the long run, Nick's jealousy can be a turning point. If they handle it well, they could become even closer, with a deeper understanding of each other's feelings. But if it's not resolved, it could potentially break their relationship apart as the jealousy festers and causes more and more problems.
If Naruto gets cheated on by Sasuke in a fanfiction, it could greatly disrupt the traditional bond between them. It might lead to Naruto feeling betrayed and could potentially make him more cynical. This could change the direction of the story, perhaps leading Naruto to focus more on his own self - growth rather than their relationship.
It can make the storyline more intense. The other characters will be in a rush to save her, and this can create a lot of drama.
The team would likely be in a state of shock at first. They've come to rely on Steve's leadership and strength. His injury could make them more cautious in their actions. They might hold back on some missions until Steve is better.
The plot could slow down. If Leo is a key figure in whatever they are doing, his injury means that their progress will be halted. His friends may have to stop and take care of him, which gives the enemies a chance to regroup or gain an advantage.
The injury can add a lot of drama. For example, if it's a serious injury, it can create a sense of urgency and suspense. Will he be able to perform again? Will his injury change his role in BTS? It can also lead to some really emotional moments, like when he first realizes the extent of his injury and breaks down.
The injured state of Joker can also be a chance for character exploration. Batman might see a more human side of Joker when he's injured and this can make Batman question his own methods of dealing with crime. It can also lead to a more complex relationship between the two characters as they are forced to interact in a different way than just the usual cat - and - mouse chase.