One interesting plotline could be Spider - Man facing off against a powerful and unexpected villain in a death battle. For example, a version where he battles an alternate - universe version of himself who has turned evil. This would create a lot of internal conflict for Spider - Man as he has to fight someone who is essentially himself but with a different moral compass.
Another plotline might involve Spider - Man teaming up with other heroes in a death battle against a common enemy. Maybe he joins forces with Daredevil and Iron Fist to take on a group of super - powered criminals. They would have to combine their unique skills and powers to overcome the odds.
Another plotline could be a death battle where a character from RWBY has to fight an alternate version of themselves. It would be a psychological and physical battle as they grapple with their own strengths and weaknesses in a different form.
Another plotline could be Spider - Man teaming up with other Marvel characters in a way that's not seen in the official comics or movies. Maybe he partners with a lesser - known hero to take on a threat that's too big for him to handle alone. This can introduce new dynamics and interactions that fans love to read about.
Perhaps in a fanfiction, Spider - Man reveals his identity to Aunt May in a moment of desperation. He's been keeping it from her for so long, but when he's severely injured and she finds him in his suit, he has no choice but to tell her. This then changes their relationship dynamic as she now has to deal with the knowledge that her nephew is a superhero and all the danger that comes with it.
One interesting plotline could be the protagonist using their knowledge from the real world to create new and unique Spider - Man gadgets. For example, they might come up with a way to make the web - shooters more efficient or have a new type of web formula.
Well, in some fanfictions under 'Spider Man The Other', there might be a plotline where Spider - Man has to deal with his new powers while also facing a personal crisis. For example, his relationships with his friends and family could be strained because he's changing in ways he doesn't fully understand. He might struggle to keep his identity a secret while these new powers are emerging in unexpected ways.
A plotline where the characters from High School DxD are pitted against characters from other similar anime in death battles. Say, Issei against Ichigo from Bleach. This would be exciting as it combines the unique powers and fighting styles of two different anime universes, and fans can speculate on who would win based on their abilities and growth throughout their respective series.
One interesting plotline could be a battle between two underrated Young Justice characters where they finally get to showcase their full powers. For example, a fight between Beast Boy and Terra in a death battle scenario where Terra has more control over her powers than in the original series. This could lead to a very different outcome and a whole new exploration of their relationship and abilities.
Venom is a very common opponent. Given their history in the official comics, it's natural for fanfiction to explore their battles further, especially in a death - battle scenario where the stakes are even higher. Their symbiotic relationship adds an extra layer of complexity to the fight.
One interesting plotline could be Spider - Man struggling to control the symbiote's more violent tendencies while still using its power for good. For example, he might accidentally harm an innocent while trying to fight a villain.
In some fanfictions with this theme, there might be a plotline where the reincarnated Spider - Man discovers new powers or abilities that were not present in the original Ultimate Spider - Man story. This could lead to him having to learn how to control these powers while also facing the challenges of being a superhero in a world that already has certain expectations of what Spider - Man can do.