The 'bruuce grabs wanda go ahead and piss me off' part of the fanfic title might suggest that Bruuce is in a very volatile state of mind. He grabs Wanda, which is a very aggressive action. This could be the start of a story where Wanda tries to figure out why Bruuce is so angry with her. Is it related to a past event? Or is it a misunderstanding? The fanfic could explore their relationship dynamics, how they communicate or rather fail to communicate in this tense situation, and how they might resolve the conflict or make it worse.
The main characters are clearly Bruuce and Wanda. Bruuce seems to be the one taking the more aggressive action by grabbing Wanda, and Wanda is the one on the receiving end of this action.
It could be about Wanda having to make a quick escape from the bridge during the events of Age of Ultron. Maybe she's being chased by Ultron's minions and has to use her powers in a new and creative way to get off the bridge safely.
She could be in the middle of a psychic battle on the bridge. When she realizes she's losing control, she decides to get off the bridge to regroup. So she uses her telekinesis to push back the opposing forces briefly and then runs off the bridge. Once off, she finds a quiet place to regain her composure and strengthen her mental defenses for the next encounter.
One possibility could be that young Xehanort grabs Kairi as part of a plan to manipulate Sora. He might think that by having Kairi in his control, he can draw Sora out and into a situation where he can be easily influenced or defeated. This could lead to a series of events where the heroes have to figure out how to rescue Kairi from Xehanort's clutches while also dealing with his larger scheme.
One way could be constantly misinterpreting Iroh's character. For example, making him overly cruel when he is known for his kindness. Another way might be writing out - of - character relationships for him, like having him suddenly be at odds with characters he was always friendly with in the original. And also, completely ignoring his backstory and the development he went through in the series can piss off fans of Iroh fanfiction.
Vision would be an obvious choice as they have a deep connection. Another could be Doctor Strange. Their different magic - based powers could create an interesting dynamic. And then there's Pietro, her brother. A story about their reunion in a different context could be really engaging.
You could have Zuko be constantly outsmarted by his enemies in really dumb ways. Also, you could make his backstory completely different in a bad way, like making his mother leave him because she didn't love him. And then, you could make him lose his temper at every little thing, which is not in line with his growth as a character in the original story. This would really get on the nerves of Zuko fans who love his character development.
One way could be to make Zuko constantly lose his battles in a really uncharacteristic and stupid way. Another way might be to give him a really cheesy and out - of - character love interest. And a third way could be to have his father be nice to him all of a sudden for no good reason.
Maybe Naruto gets pissed off because his friends don't believe in him. For example, if they suspect him of being involved in something bad without evidence.
Maybe it's about three people having amazing adventures at Hogwarts. They could be learning magic, making new friends, and getting into all sorts of trouble like sneaking into the Forbidden Forest or trying to find hidden passages in the castle.