Well, a cool plot could be reincarnating into the body of a Stark Industries employee. You then use your knowledge of future tech from your past life to revolutionize Stark's inventions even further. This could lead to new and improved Iron Man suits way before they were originally created in the Marvel timeline. Or, you could be reincarnated as an Asgardian commoner but with a deep knowledge of Earth's cultures. You could introduce things like rock music to Asgard, creating a whole new cultural exchange between the two realms.
One idea could be the slime exploring a new, uncharted part of the fantasy world. Maybe it discovers a hidden civilization of magical creatures that have unique powers and a different social structure. Another plot could involve the slime forming an alliance with a powerful but misunderstood monster against a common enemy, like an evil wizard who wants to enslave all non - humanoid beings.
One idea could be a character reincarnated as a different species, like a dragon. They could then use their new form to influence the power struggles in Westeros. Another could be a reincarnated character remembering key events from the original series and trying to prevent certain tragedies from occurring. For example, if Ned Stark was reincarnated, he might be more cautious and avoid getting caught in the political traps that led to his downfall.
Well, a great plot for a'reincarnated in pokemon world fanfic' might be the main character reincarnated as a pokemon scientist in the pokemon world. They could use their modern - day knowledge to make new discoveries about pokemon evolution or types. For example, they might find a new way to make pokemon evolve faster or discover a previously unknown type of pokemon. Or perhaps they're reincarnated as a gym leader and have to use their unique skills and knowledge to make their gym more challenging and popular.
One idea could be that Master Chief gets transported to the Marvel universe. He teams up with the Avengers to fight a common enemy like Thanos who has somehow obtained Covenant technology. His Spartan abilities would be a great addition to the team.
A plot could be about an alternate universe where Captain Marvel is initially distrusted by the Avengers. She has to prove herself and in the process, they all learn more about each other's powers and pasts. This could lead to some great character development and new alliances within the team.
One plot idea could be Master Chief getting transported to the Marvel Universe. He could team up with the Avengers to fight a common threat like Thanos. His advanced combat skills and Spartan armor would add a new dynamic to the team. Maybe he'd be initially distrusted, but prove his worth in battle.
One idea could be that the reincarnated Lannister has all the memories of their past life. They could use this knowledge to avoid the mistakes their previous self made. For example, not getting involved in certain political schemes that led to their downfall. Another plot could be that they try to change the fate of their family members. Maybe prevent Jaime from losing his hand or stop Cersei from going down her tyrannical path.
One idea could be that the universes of DC and Marvel collide due to a powerful magical artifact. Heroes and villains from both sides have to team up to stop the destruction of both universes. For example, Superman and Captain America leading their respective groups in a battle against a combined force of Darkseid and Thanos who are trying to use the chaos to gain ultimate power.
Maybe an OC who is a scientist in both universes. They accidentally create a device that merges some of the characters' powers in unexpected ways. This leads to a series of adventures where they have to deal with the consequences, like a new villain emerging who has a jumbled set of powers. The OC then has to team up with some well - known characters to fix the situation.
One idea could be to explore the origin of the zombie virus in the Marvel universe more deeply. Maybe it was a failed experiment by a mad scientist in Stark Industries. Another idea is to focus on a group of survivors, like Spider - Man and Daredevil, trying to find a cure while fighting off zombified heroes. You could also write about how the zombified heroes' powers are affected by their undead state.