One possible plot could be that the Naruto characters are trapped in a prison-like dimension similar to the mob of the dead setting. They have to fight against zombie - like creatures that are somehow related to dark chakra. Naruto could use his shadow clones to outwit the hordes, while Sasuke uses his Sharingan to detect the weaknesses of these strange foes.
It could be Orochimaru. He has always been interested in dark and forbidden jutsus. He might have found a way to create the 'mob of the dead' situation to test his new powers or to capture Naruto for his own purposes. He could use his snake - like minions along with the undead to create chaos.
Maybe Naruto is betrayed by someone within the village who sets him up to look like he's dead. Left for dead, he's found by a hermit who teaches him new and powerful jutsu. With his new skills, he plans to return to the village to expose the traitor and prove his worth once again.
The plot might center around a mission to find a cure for the zombie outbreak in the Highschool of the Dead world. The Naruto characters could bring their unique abilities to the table. Sakura's medical skills could be crucial in trying to understand the nature of the zombie virus. And Naruto's determination would keep everyone's spirits up during the tough times. Also, there could be some interesting power - up scenarios. Maybe some of the Highschool of the Dead characters could learn some basic ninja techniques from the Naruto gang.
In this fanfic, perhaps Naruto is trying to deceive everyone into thinking he's the dead last as part of a long - term strategy. He might be secretly training in a unique and powerful jutsu that he doesn't want anyone to know about until he's fully mastered it. So, by acting like the worst student, he has more freedom to experiment without interference.
Maybe Naruto isn't actually dead. He could be in a hidden dimension or under some powerful genjutsu that makes others think he's dead. Another plot twist could be that his death was faked by an enemy to create chaos in Konoha, and Naruto is actually on a secret mission to expose the real threat. Or perhaps Naruto's 'death' triggers a hidden power within him that resurrects him in a new and more powerful form.
One possible plot could be Naruto and his friends getting transported to the world of The Walking Dead. Naruto's ninja skills would be extremely useful in fighting off the zombies. For example, his Shadow Clone Jutsu could be used to create distractions while they search for supplies or a safe place to stay. His Rasengan could also be a powerful weapon against groups of zombies. Maybe they team up with some of the survivors from The Walking Dead, and Naruto teaches them some basic ninja self - defense techniques.
Well, imagine the ninjas in the Naruto world are suddenly faced with the same post - apocalyptic situation as in 'The Walking Dead'. Sasuke might be off on his own initially, thinking he can handle the zombie threat alone. But Naruto would be all about bringing people together, like the Konoha villagers, to build a safe haven. They could learn from each other's survival skills. The zombies in this crossover could be extra tough, with some having chakra - like abilities because of the different world they are in now.
In this fanfic, Naruto and Amber could have different goals at first. Naruto might be on a quest to find a way back to his own world, while Amber is trying to rescue her family or something. However, as they face the common enemy of the zombies, they realize that they need to work together. Naruto's chakra - based abilities could be a huge asset in dealing with the powerful zombies. For example, his Rasengan could be used to take out large groups of zombies at once. Amber, on the other hand, could be the one with the knowledge of the layout of the area in Dead Rising 2, guiding Naruto through the dangerous streets and buildings.
Well, it could lead to chaos in the Hidden Leaf. His friends like Sasuke might go on a vengeful rampage. They would be filled with rage and guilt, thinking they could have prevented it. The village would also be in turmoil, as Naruto was their hero and a symbol of hope.
One possible plot could be that Naruto discovers he has the Dead Bone Pulse ability through some strange encounter. Maybe he meets a hidden clan member who unlocks this power within him. Then he has to learn to control it while still maintaining his regular ninja skills.