Well, a great plot twist could be that Batman discovers that Naruto is being controlled by an evil force. Instead of fighting Naruto, he decides to help him break free from the control. This would lead to an unexpected alliance between them. Another plot twist could be that the fight between them is actually a test set up by some higher - level beings from both universes. They are being watched and judged based on how they fight and interact. And if they pass the test, they are given a special power or mission. Or maybe there's a plot twist where Naruto's friends from Konoha are kidnapped and held hostage by someone who wants Batman to defeat Naruto. Naruto then has to decide whether to fight Batman or try to find another way to save his friends in this fanfic scenario.
One interesting plot twist could be that Naruto is actually related to a Marvel character through some ancient connection. Maybe his chakra has a link to the Infinity Stones in the Marvel universe. Another could be that the Avengers are transported to the Naruto world and have to learn ninjutsu to survive. And a third one might be that Naruto gets the powers of a Marvel hero like Spider - Man and has to deal with the new abilities while still being a ninja.
In some Batman vs Avengers fanfiction, a great plot twist is when Batman manages to hack into the Avengers' communication system and makes them fight among themselves. He then uses the chaos to his advantage. Another cool twist is that there's a greater threat looming, and Batman and the Avengers have to put aside their differences and work together. But as they do, they discover that one of the Avengers has been replaced by a shape - shifter, and Batman has to figure out who it is before it's too late. There could also be a plot twist where Batman uses a device that actually amplifies his own strength and skills to the point where he can match the Avengers' superpowers, at least temporarily.
A really cool plot twist would be if Batman manages to steal all of Thanos' Infinity Stones and use them against him. This would completely turn the tables. Or perhaps there's a plot twist where Batman uses his detective skills to uncover a secret weakness of Thanos that no one else knew about. Maybe it has something to do with Thanos' past or his family, and Batman uses this knowledge to his advantage in the fight.
In some 'naruto batman fanfic', a plot twist could be that Naruto's chakra is somehow linked to the power source of Batman's technology. So when Naruto is in danger, it affects Batman's gadgets. This unexpected connection changes the way they fight together and adds a new layer of complexity to their relationship.
One possible plot twist could be that the real enemy is secretly manipulating the Shinobi Alliance to fight Naruto. So Naruto has to not only defend himself but also figure out who is behind it all. Another could be that Naruto discovers a hidden power within himself during the fight that changes the course of the battle.
One possible plot twist could be that Hinata discovers a new power within herself during the fight against Pain. Maybe she can tap into some ancient Hyuga ability that even she didn't know existed. This new power could turn the tide of the battle and surprise both Naruto and Pain.
One possible plot twist could be that Pennywise actually has a fear of bats, which gives Batman an unexpected advantage. Another could be that Pennywise manages to possess Batman and uses his skills and resources to wreak havoc in Gotham, but Batman's consciousness fights back from within. Or perhaps there's a plot twist where the two form an unlikely alliance to fight a greater evil that is threatening both their existences.
A great plot twist would be if the Fairy Tail guild members were transported to the Naruto world and had to adapt to ninja life. Or perhaps a character from Naruto, like Sasuke, gets corrupted by the dark magic in the Fairy Tail world. It would create a whole new dynamic as the other characters try to save him. Also, what if there was a prophecy in both worlds that the only way to save them was for a Fairy Tail wizard and a Naruto ninja to sacrifice themselves? That would be a very intense plot twist.
Well, a plot twist could be that the modern army's weapons are actually ineffective against the fantasy creatures because they are made of some sort of magical substance that absorbs or deflects the bullets and missiles. Then, a lone scientist in the modern army discovers a way to combine magic and technology, creating a new weapon that can defeat the fantasy side. Another plot twist could be that the fantasy side has a prophecy that a group of modern soldiers will save their world, so instead of fighting, they welcome the modern army and ask for their help against an even greater evil within their own realm.
The plot of a 'batman vs the shredder fanfic' might involve a crossover of their two worlds. The Shredder could be lured to Gotham by the promise of power or revenge. Batman, on the other hand, sees the Shredder as a threat to the safety of his city. Their encounter could lead to a series of intense battles where Batman has to adapt his fighting style to deal with the Shredder's aggressive and acrobatic ninja attacks. The fanfic could also delve into how the two characters view each other's moral codes, with Batman's no - kill rule contrasting with the Shredder's more ruthless approach.