Well, one possibility is that his team members go into a full - on investigation mode to find out who shot him. They might follow some leads that initially seem promising but turn out to be dead - ends. Meanwhile, McGee could be in a critical condition in the hospital, with his life hanging by a thread, and his friends are all worried sick about him.
It could be a former criminal that McGee helped put away. They might have escaped from prison and are seeking revenge on him for ruining their life.
Another plot twist could be that the shooter has a personal vendetta against Callen, but it's based on a misunderstanding. As Callen lies injured, the team discovers that the shooter thought Callen was responsible for something he didn't do. This could lead to a redemption arc for the shooter and a new friendship or alliance in the end.
Well, perhaps a new character introduced in the fanfiction. Maybe a spy from a rival agency who sees Abby as a threat to their mission. Or it could be an associate of a major criminal that the NCIS has been investigating. They might think that by shooting Abby, they can disrupt the investigation. Also, it's possible that it's a person with a personal vendetta against Abby, like someone she unknowingly wronged in the past.
In this type of fanfiction, it might be that Kensi is lured into a trap and gets shot. Her teammates would be devastated. The story could show how they hunt down the people responsible. As Kensi is in recovery, she could have some self - doubts about her abilities. But with the support of her team, she gradually overcomes these and gets back to her old self, stronger than ever.
Perhaps McGee gets hurt while trying to protect a key witness. His injury could lead to a series of self - doubts as he recovers. Meanwhile, the team struggles to keep the witness safe without McGee's usual expertise. This could also be a chance for other characters to step up and show their loyalty to McGee.
He might be in a critical condition. His partner Kensi could be blaming herself for not being there to protect him. The team would be on high alert to find the shooter and make sure there are no further threats to Deeks or the rest of the team.
A possible suspect could be an informant who has turned on Tony. Maybe the informant was promised a better deal by another party if they got rid of Tony. Also, it could be a new criminal on the scene who sees Tony as a threat. This new criminal might be trying to establish their power and reputation, and taking out a well - known NCIS agent like Tony would be a big statement. Another suspect could be a person with a grudge against the NCIS in general, and Tony just happens to be an easy target.
Obviously, McGee is the central character as he's the one getting hurt. Gibbs would surely be involved. He'd be the one leading the investigation into McGee's injury, using his no - nonsense approach. DiNozzo would also be there, probably cracking some inappropriate jokes at first to lighten the mood but then getting serious as the situation unfolds.
A plot twist might be that Abby discovers she's pregnant before the wedding, but she's not sure if McGee is ready for fatherhood. This could create a rift between them as they struggle to communicate their feelings. Or, it could turn out that someone has been secretly trying to break them up all along, and at the last minute, they reveal all the lies and misunderstandings they've been spreading. Also, there could be a situation where McGee has an accident and loses his memory, forgetting about the wedding and his relationship with Abby, leading to a heart - wrenching journey of her trying to make him remember.
Well, it could be that the raven is a special or magical raven. Maybe it was flying over a restricted area and got shot by a hunter who didn't realize its importance. Then, the story could follow how the raven's friends or family try to save it or seek revenge on the shooter.