One possible plot could be that Harry is sent to Hell due to a powerful dark magic spell gone wrong. In Hell, he has to face his worst fears and demons, both literal and metaphorical. He might encounter lost souls who tell him secrets about the magical world. Eventually, he manages to find a way back, using his wits and some unexpected magical abilities he discovers during his ordeal.
The main antagonist could be the Devil himself. He might see Harry as an intruder in his domain and try to keep him there forever. He could set up all kinds of traps and challenges for Harry to overcome.
One possible plot could be that Harry uses some powerful time - turning magic to go back in time. He then has to hide his true identity from his younger self while trying to guide and raise himself. Maybe he teaches his younger self some advanced magic that he didn't learn until later in his original life, like more complex Patronus charms or advanced defensive spells.
Well, one possibility could be that Harry, perhaps from the Harry Potter universe, gets thrust into the dangerous world of John Wick. He could use his magic in unexpected ways in the assassin - filled world. For example, he might use a spell to disarm his opponents instead of using guns like John Wick. He could also use his broomstick for quick getaways in the city streets, adding a unique twist to the high - octane chases that are typical in the John Wick movies.
One possible plot twist could be that when they go back in time, they accidentally change something that has a huge impact on the present. For example, they might prevent the sorting hat from putting them in their original houses. This could lead to a completely different dynamic at Hogwarts, with different friendships and rivalries forming.
Maybe Naruto goes to hell to rescue a friend or to face some powerful dark forces. For example, he might go to save Sasuke who got trapped there somehow.
Well, one possibility could be that Harry is driven by a deep sense of betrayal. Maybe he discovers some dark secrets about the wizarding world that make him question everything he has believed in. For example, if he finds out that Dumbledore has been using him all along for some self - serving purpose. This could push him towards the dark side as he feels that the so - called good side is just as corrupt.
Well, perhaps when Fred goes back, he discovers that the danger to Harry is much more complex than he initially thought. There could be a traitor among the people he thought were allies in the past. Also, Fred himself might get stuck in the past and has to find a way to get back while still ensuring Harry's safety. Maybe the time - traveling magic is being manipulated by a hidden enemy, and Fred has to figure out who and how to stop it to save Harry.
One possible plot twist could be that when Harry goes back, he discovers that Snape's situation is far more complex than he initially thought. Maybe Snape was involved in some secret mission that put him in danger, and Harry's interference actually endangers the entire wizarding world in unexpected ways. For example, Snape might be on the verge of uncovering a new dark magic plot that Harry's presence disrupts.
One possible plot twist could be that Snape, in his attempt to save Harry, accidentally changes the entire future of the wizarding world. For example, he might prevent Voldemort from ever rising to power in the first place, which would mean that all the relationships and events that we know from the original story would be completely different. Another plot twist could be that Snape discovers that saving Harry is not as straightforward as he thought. Maybe there are dark forces at work that are trying to stop him from changing the past, and he has to fight against them while also trying to protect Harry.
One possible plot could be that Kagome goes back in time and tries to change a major event in the past. For example, she might try to prevent a big battle that had a lot of casualties. She could use her modern knowledge and skills to her advantage in the past, like using first - aid knowledge to save lives.