One possible storyline could be Sylvanas' struggle with her past and her newfound power in the Shadow of War universe. Maybe she's trying to find a way to redeem herself after all the dark deeds she has done. Another could be her forming unexpected alliances with other characters in the game, like an alliance with a group of outcasts to take on a greater evil.
In some fanfictions, Sylvanas might be on a quest to discover the true nature of the power that controls the events in Shadow of War. This could lead her to ancient places and encounters with long - forgotten beings. She could also be in a love - hate relationship with another powerful character, where their interactions drive the story forward with a lot of tension and drama.
Perhaps a fanfiction could explore Sylvanas' view on the different races in the game. She could start to see the value in some of the races she previously despised. For example, she might come to respect the tenacity of the dwarves and their mining skills, and how that could be useful in the war - torn world of Shadow of War. This new - found respect could then lead to new diplomatic relations and plot twists.
One interesting storyline could be Talion and Shelob forming an unlikely alliance against a greater evil in Mordor. They might combine their unique powers, Talion's combat skills and Shelob's web - spinning and venomous attacks, to take on powerful orc warlords.
The Ents could be an interesting potential ally. Their connection to nature and their power could be something that Sylvanas would want to harness for her own ends. On the other hand, the Uruk - hai, with their brute strength and loyalty to the dark forces, would almost certainly be enemies. Their chaotic and violent nature would be in direct opposition to whatever plans Sylvanas has in the fanfiction.
A really cool storyline is when they are sent on a mission to a parallel dimension. In this dimension, their personalities are slightly different, and they have to adapt while still trying to achieve their mission goals. It's interesting to see how they interact with the alternate versions of themselves and other characters. This type of fanfiction often explores the concept of identity and how their relationship might change in different circumstances. And it can be full of action, mystery, and character development.
One interesting storyline could be about a hidden civilization discovered during the war of discoveries. This civilization has unique technologies that could change the course of the war.
There might be a fanfiction where a female character defies the norms of the medieval society in the game. In a world dominated by male warriors, she disguises herself as a man to join the military. Along the way, she faces many challenges not only from the enemy but also from within her own army as she tries to keep her identity a secret. However, her intelligence and combat skills prove invaluable, and she becomes a key figure in several important battles, changing the course of the war and the perception of women in the fictional world.
Another good storyline could focus on the experiences of individual soldiers that are not well - known in history. Maybe a story about a young soldier from a small town who has to face the horrors of war and how he copes with it. This can give a more personal touch to the large - scale events of the world war.
One interesting storyline could be about a group of overlooked heroes in the North who form an alliance to fight off a new and unexpected threat that the main characters in the original LotR didn't face directly. They might discover ancient magic or weapons that change the course of the war in the North.
One interesting storyline could be about the different cultures clashing in a more in - depth way. For example, how the modern Earth military deals with the unique magic and social structures of the other side of the gate. Another might focus on individual characters' growth as they are thrust into this new world of war, like a young soldier learning to respect and adapt to the alien cultures. And there could also be a storyline about a diplomatic solution being attempted in the midst of all the chaos, which would involve lots of political intrigue and negotiation between the two sides.
One interesting storyline could be about a new character in the Gears of War universe who finds himself in a harem situation with some of the strong female characters. For example, he might have to work with them to fight off a new threat while also dealing with the complex relationships within the harem.
One interesting storyline could be a fanfic where a character uses shadow clones to explore different paths in life simultaneously. For instance, one clone might pursue a path of strict ninja training, another could focus on learning about the village's history, and the original character gets to experience the knowledge and skills gained from all these different 'lives' of the clones.