A great plot twist could be that Percy Jackson discovers he has a connection to the God of War universe that he never knew about. Maybe one of his ancestors was from that world and it gives him some unexpected powers or abilities. For example, he could suddenly be able to use some of Kratos' signature weapons in a new way.
A great plot twist could be that Naruto is actually a demigod in the Percy Jackson sense all along. Maybe his parents were from the world of Greek gods but were sent to the Naruto universe for some reason. Another twist could be that the God of War, say Kratos, is actually related to one of the main clans in the Naruto world. This would completely change the power dynamics and relationships in the fanfiction.
One common plot twist is the discovery of a hidden power. For example, the reincarnated character might suddenly find out they have a unique ability related to a minor god that no one expected. Another is a change in the prophecy. Instead of the original prophecy being fulfilled in the expected way, it takes a different turn because of the reincarnated character's presence. And sometimes, there's a betrayal from an unexpected source, like a character who was thought to be a friend turns out to be working for an enemy due to some dark secret from the past.
One interesting plot twist could be that Percy discovers a new power within the gamer - like world that he didn't know he had. Maybe he can suddenly control the elements in ways he couldn't before, like creating ice sculptures out of thin air when his main power was water - based before.
A possible plot could be that Kratos is somehow transported to Percy's world. Percy initially mistakes Kratos for a new threat but then realizes they could work together. They join forces to stop a dark god from rising who wants to destroy both their worlds.
One great 'god of war percy jackson fanfic' could be 'Percy in the Realm of Kratos'. It combines the adventurous spirit of Percy Jackson with the brutal world of God of War. Percy's skills and powers are put to the test in a whole new way as he encounters the challenges that Kratos usually faces.
A possible plot twist could be that Percy's loyalty is tested between the Greek and Shinto gods. Maybe the Shinto gods want him to do something that goes against the Greek gods' wishes, and he has to decide which side to take. Another twist could be that Percy discovers he has a long - lost Shinto sibling who has been working against him all along, thinking he's a threat to their place in the Shinto pantheon.
Well, a frequent plot twist is related to Percy's origin. In some fanfictions, it turns out that his assassin - god powers are not a result of some new blessing but are actually related to his long - lost family heritage. Maybe he has a secret relative who was an assassin - god in the past. Also, there can be a plot twist where the entire concept of the 'God of Assassins' is a ruse created by a more powerful god to manipulate Percy. He might think he's on a path to become this new entity, but in reality, it's all part of a bigger scheme. Another interesting plot twist could be that the mortal world starts to notice Percy's assassin - like activities, and he has to deal with both the godly and mortal consequences.
Another theme is the idea of heroism. Percy is a hero in his own right, and Kratos is an anti - hero. Fanfics might explore how their concepts of heroism can either clash or merge. For instance, Percy's selfless heroism might influence Kratos' more self - serving actions, or vice versa. This exploration of different types of heroism makes for some really engaging stories.
One possible plot twist could be that Artemis's blindfold is actually a self - imposed thing to gain a new power, and Percy discovers this secret halfway through the story. This would completely change their dynamic as Percy realizes he may not have been needed as much as he thought.
One interesting plot twist could be that a character thought to be an enemy turns out to be a long - lost ally. Maybe a cursed book reveals a prophecy that changes everyone's perception of the character's true nature.