One interesting plot could be that Ichigo and Naruto are brought together in a strange alternate dimension. In this dimension, they have to team up to fight a new common enemy that has powers combining the Hollow and the Nine - Tails. They start off not understanding each other's abilities but gradually learn and combine their powers in unique ways to defeat the enemy.
A cool plot could involve a powerful villain who is stealing spiritual energy from both the Bleach universe and the Naruto universe. Ichigo and Naruto meet by chance while both investigating the disappearances in their own worlds. They soon realize the connection and join forces. Ichigo teaches Naruto about reiatsu and how to sense spiritual beings, while Naruto shows Ichigo some of his advanced ninja techniques. Together, they track down the villain and engage in an epic battle.
Maybe there's a plot where Ichigo's Soul Society and Naruto's Hidden Leaf Village are somehow connected through a mysterious rift. Ichigo and Naruto are chosen as representatives from their respective worlds. They must travel between the two realms, sharing their combat techniques and learning from each other. Along the way, they face challenges from both sides who are skeptical of this new alliance, but they prove that their combined strength can bring great benefits.
One possible plot could be that Ichigo and Yoruichi are thrown into an alternate dimension where they have to team up to find a way back home. Along the way, they discover new powers within each other and face powerful enemies together.
One possible interesting plot could be Ichigo finding himself in a world where he has no identity or recognition. He could start a journey to regain his status while facing challenges from the new world's rules and characters. Maybe he has to form alliances with unlikely characters to survive and prove his worth.
One possible plot could involve Ichigo's spiritual energy causing a ruckus in the DxD world. His power might be misinterpreted, and he has to prove that he's not a threat. At the same time, he could learn some unique abilities from the DxD characters, and they from him. For example, the devils in DxD might be interested in Ichigo's zanpakuto and its powers, while Ichigo could gain some knowledge about magic from them.
Maybe in this fanfiction, the gamer aspect brings in a system of quests to the Naruto world. Naruto has to complete various quests around the Hidden Leaf Village, like helping villagers with their daily problems or finding rare items. These quests could reward him with new jutsu or power - ups. It would be like he's living in a real - life RPG, which would add a whole new layer of adventure to the Naruto universe.
One possible plot could be that Naruto and his friends from the Naruto universe are suddenly transported to the Destiny universe. They could be mistaken for new Guardians at the Tower. Naruto's chakra abilities might be misinterpreted as a new form of Light power. They then have to team up with Destiny's Guardians to fight against a common enemy that threatens both universes, like a powerful Darkness entity that has somehow found a way to cross over from Naruto's world where the Akatsuki's actions have weakened the barriers between worlds.
A plot might involve Batman investigating strange energy readings in Gotham that turn out to be related to Naruto's world. Naruto arrives in Gotham following a villain from his own world who is after some powerful technology in Batman's possession. Naruto and Batman start off at odds but as they learn more about each other's strengths and motives, they form an alliance. Naruto teaches Batman about chakra and the ninja way, while Batman shows Naruto how to use stealth and technology in a more urban environment.
One possible plot could be that Naruto, through some strange space - time rift, ends up in Kaguya's era. He could then team up with her against a common enemy that threatens both their worlds. Naruto's unique jutsu and his never - give - up attitude might inspire Kaguya, and together they could create new and powerful techniques.
One possible plot could be Naruto and his friends being summoned to the world of For Honor. Naruto, with his ninja skills, could team up with the samurai and Vikings in For Honor. He might teach them some of his unique jutsu, like the Shadow Clone Jutsu to create diversions in battles. And in return, he could learn the combat styles of the For Honor warriors. They could then face a common enemy that threatens both the ninja world and the For Honor world.
One possible plot could be that Tenten discovers a hidden jutsu in an ancient scroll that was once used by Naruto's clan. This jutsu has the power to create portals to different dimensions. Naruto, being curious and always up for an adventure, teams up with Tenten to explore these new dimensions. Along the way, they face various challenges and enemies, and also learn more about each other's skills and pasts.
One interesting plot could be that Naruto is somehow transported to the DC universe. He teams up with Superman. Naruto's chakra and his ninja skills like shadow clones could be used in unique ways to fight villains. For example, the shadow clones could be used to distract enemies while Superman delivers a powerful blow. It would be a clash of two very different power systems and cultures.