What would happen if fictional assassins faced off?

It's hard to say exactly. Maybe it depends on the skills and resources of both the assassin and FF. Could go either way.

If Godzilla faced the Avengers in fanfiction, there would be a lot of destruction. Godzilla would start by rampaging through the city. The Avengers would assemble quickly. Iron Man would probably be the first to engage, flying around Godzilla and trying to find a weak spot. Then Thor would come in with his hammer, trying to stun Godzilla. But Godzilla's thick skin might protect him. Hulk would also jump into the fray, and it would be a clash of titans.

If Percy Jackson were to face a boggart in a fanfiction, it could be really interesting. Percy is used to dealing with Greek monsters, but a boggart is a different kind of threat. It takes the form of your worst fear. Since Percy has a lot of fears, like losing his friends or failing to protect his loved ones, the boggart could transform into something really terrifying for him. He might initially approach it like any other enemy, but then realize that it's not as straightforward as slashing it with his sword. He'd have to figure out a different way to defeat it, perhaps using his wits and courage in a new way.

It could be chaotic! Fictional characters often have extraordinary powers or traits that might disrupt the normal order of things.

It would be total chaos! With characters from all kinds of universes and with different powers and abilities, there would be no way to predict the outcome.

If a fictional character were voted president, it would be a total chaos. Laws and systems are designed for real individuals, and a fictional character simply couldn't function within those constraints. It's more of a fun imagination than a feasible situation.

It would be a total chaos. Fictional characters have their own made-up rules and powers that don't fit into the real legal system.

Maybe it's because European history and culture offer rich settings and backstories for assassins. Also, some classic spy and thriller genres originated there.

If Batman joins the League of Assassins in fanfiction, he might initially be seen as a powerful asset. His skills in combat, detective work, and strategic thinking could be used to further the League's goals. However, he would also likely be at odds with their more extreme and unethical methods. He might try to reform the League from within, or he could be using his membership as a way to gather intelligence on them for the greater good of Gotham.

If The Beatles reunited on SNL, it might generate massive media attention and boost the show's ratings. It could also reignite interest in their classic songs and inspire a new generation of music lovers.