In Thor vs Iron Man fanfictions, a really interesting plot twist is when the two are forced to work together against a common enemy. They start off as rivals but then realize that they need each other's skills. Another popular twist is when there is some sort of time - travel or alternate dimension involved. Maybe Iron Man travels to a time when Thor was a young and inexperienced warrior, or Thor finds himself in a dimension where technology is far more advanced than in Asgard and he has to adapt quickly to face Iron Man. These plot twists keep the fanfiction fresh and exciting for readers.
One interesting plot twist could be that Iron Man discovers a hidden power within his suit that can counter the Infinity Stones. Maybe it was something he unknowingly built into it long ago.
One interesting plot twist could be that Ultron hacks into Spider - Man's suit. This would put Spider - Man at a huge disadvantage as Ultron could control his movements or disable some of the suit's functions.
One interesting plot twist could be that Mega Man and Astro Boy end up teaming up instead of fighting. Maybe they realize they have a common enemy that is threatening both of their worlds. Another plot twist could be that Astro Boy discovers he has a hidden ability that makes him immune to Mega Man's weapons, which completely changes the dynamic of their fight. Or perhaps Mega Man gets corrupted by some outside force and Astro Boy has to find a way to save him and bring him back to his normal self.
Well, the revelation that Obadiah Stane was behind some of the attacks on Stark Industries was a major plot twist. He was supposed to be a trusted figure, but turned out to be a villain. This added a whole new layer of drama and conflict to the Iron Man comics story as Stark had to deal not only with external threats but also this betrayal from within.
Well, it really depends on how the fanfiction is written. If the story focuses on Iron Man's technological advancements and his ability to quickly analyze and counter Thor's attacks, he might have a chance. However, Thor's raw power is not to be underestimated. He has centuries of combat experience and his powers are magic - based, which could potentially bypass Iron Man's technological defenses. So, more often than not, Thor has the upper hand.
One popular plot twist is when they end up swapping powers. Percy suddenly has control over wind and lightning while Jason can control water. This flips the script and makes for some really interesting scenarios.
One popular plot twist is when the Phoenix force corrupts Spider Man. Instead of using the newfound power for good, he starts to become more aggressive and self - centered. This forces his friends and allies to try and save him from the dark influence of the Phoenix.
One interesting plot could be where Metallo somehow gets an upgrade that can disrupt Iron Man's technology. Then Iron Man has to rely on his wits and basic engineering skills to fight back. Another could be a scenario where Iron Man has to protect a city from Metallo without using his full - powered suit, making it a more challenging fight.
In a Saitama vs OC fanfiction, a plot twist could be that the OC has the power to make Saitama lose his strength. However, the OC doesn't want to use this power because they admire Saitama and want to test their own strength against him fairly. Another interesting twist could be that the OC is a part of a bigger plan by some mysterious organization. They use the fight against Saitama as a distraction while they carry out their real objective elsewhere. And as the fight progresses, Saitama realizes this and has to decide whether to continue the fight or go after the real threat.
One interesting plot twist could be that Brightburn is actually from the same planet as Superman but was sent to Earth for a different purpose. Maybe he was an experiment gone wrong. Another could be that Superman's powers start to fade during the fight, making it a more even battle. Or perhaps Brightburn is being controlled by an unseen force that Superman has to figure out how to stop while also fighting him.