In some fanfictions, perhaps the concept of watches is used as a metaphor for the characters' lives. For instance, Rem's unwavering loyalty could be compared to a watch that never stops ticking, always there for Subaru. The fanfiction could explore how different characters' 'watches' (lives) are intertwined and how they affect each other.
One interesting story could be about Subaru using his 'Return by Death' ability in a new and unexpected way within the world of watches. Maybe he discovers a watch that has some sort of magical power related to time, and his ability interacts with it in a strange manner.
In some 'Re Zero Gamer Fanfiction', the concept of leveling up could be introduced. Subaru discovers that he can gain experience points not just from battles but also from making important decisions or helping the people of the world. This changes his approach to the world and creates a whole new narrative arc as he tries to level up as fast as he can to become more powerful.
One interesting 'Re Zero Reaction Fanfiction' could be the ones where the characters react to modern technology. For example, Subaru being introduced to a smartphone and his hilarious reactions to all the apps and functions. Another could be the characters' reactions to different cuisines from our world. Emilia trying pizza for the first time and her delight in the new taste.
One interesting 'Re:Zero Reacts Fanfiction' story could be where the characters react to modern technology. For example, Subaru seeing a smartphone for the first time and being completely baffled by its capabilities. Another could be them reacting to different anime worlds, like seeing the action - packed scenes of 'Attack on Titan' and being in awe.
Another idea is to write a fanfiction where the roles are reversed. Make Emilia the one with a special power and Subaru as the more 'normal' character who has to support her. It could be fascinating to see how Emilia would handle the burden of a power like Return by Death and how Subaru would adapt to being in a more supportive role.
One interesting 're zero fanfic' could be one where Subaru has a different set of powers from the start. It changes the whole dynamic of how he interacts with the characters and the challenges he faces in the world of Re:Zero.
There are some 'Re Zero Male OC Fanfiction' where the male OC is a healer from a far - off land. His healing abilities are not just physical but also mental, and he uses his skills to help the characters deal with the psychological trauma they face in the Re Zero world. He might form a special bond with Emilia as he tries to heal her from the emotional scars of her past.
One interesting story could be about the cast reacting to Subaru's different loops. They might be shocked at how he endures so much pain and yet keeps coming back. Another could be their reaction to learning about the true nature of the Witch's Cult. It would be fascinating to see how they deal with the revelations.
Another possibility is a crossover with 'My Hero Academia'. Subaru could be a student at U.A. High School. His Return by Death power would be like a quirk. He might struggle at first to control it and fit in, but eventually use it to save his classmates from villains, in a way that surprises everyone with his growth and resourcefulness.
You could create an OC who is a master of illusions. This character could use their powers to deceive both enemies and allies, and their backstory could involve being an outcast from their own illusionist clan because they refused to use their powers for evil. In the Re:Zero world, they could help Subaru by creating diversions during battles or by using illusions to uncover hidden truths.
Well, a cool concept in Naruto Re Zero fanfiction might be the idea of Sasuke in the Re Zero world. He could be seen as a very powerful and mysterious figure, with his Sharingan being a great asset in the world full of magic and danger. Also, the idea of Naruto befriending Subaru and learning from each other's experiences of facing difficulties over and over again can be really interesting.