In some fanfiction, a psyker might end up with a harem of followers who are attracted to his power. They could be from different species like Eldar, Human, and even Ork (in a more comical take). The psyker has to manage their loyalty while also dealing with the threats in the 40k cosmos.
A story might revolve around an Inquisitor who, during his investigations, gathers a group of female companions from various worlds. These women have different skills and knowledge, and together they form a sort of harem around the Inquisitor. They help him in his quests to root out heresy and chaos, while also having their own sub - plots and character development within the harem - like setup.
One interesting plotline could be a Space Marine finding himself in a situation where he has to protect a group of diverse female characters from different factions in the Warhammer 40k universe. This creates a harem - like dynamic as they all rely on him and he has to navigate their different personalities and abilities.
One interesting plotline could be about a low - level gamer character rising through the ranks in the Warhammer 40k universe. They start with a small, weak force and gradually build it up into a powerful army, facing challenges like rival factions and difficult terrains.
A really cool plotline could be centered around a real - life military unit that somehow gets their hands on some Warhammer 40k - like technology. They start using it, but then attract the attention of the Inquisition - like forces from the game's lore. They then have to prove that they are not heretics while also dealing with the new - found power and the consequences that come with it.
One interesting plotline could be a Dark Eldar raiding party stumbling upon a lost Imperial relic. They see it as a valuable item to either use for their own dark purposes or sell on the black market in Commorragh. Another could be a story about a Dark Eldar wych who tries to rise through the ranks by challenging powerful rivals within her own cult.
In some fanfictions, there might be a story where a human discovers an ancient Eldar artifact. This leads to an Eldar coming to claim it. Instead of fighting, they negotiate and end up on a journey together to understand the true power of the artifact. Along the way, they learn about each other's cultures and form an unlikely bond.
The plotline about the Dark Angels Space Marine chapter is also captivating. They have a dark secret in their past related to the Fallen Angels. They are constantly on a quest to redeem themselves while still serving the Imperium. And the story of the Sisters of Battle, a female - only military order in the Imperium, is full of tales of faith, combat, and loyalty.
A lot of the novels explore the origin and growth of the Black Templars. They have a rich history that is tied to the broader Warhammer 40k universe. Their relationship with the Imperium and how they uphold its values in their own unique, often more extreme, way is a central plotline. There are tales of individual Black Templars heroes rising through the ranks, facing impossible odds, and still emerging victorious, which is always exciting to read about.
One non - sexual plotline is the conflict between the Eldar and the Dark Eldar. The Eldar are an ancient and once - powerful race trying to hold on to their remaining civilization, while the Dark Eldar are a sadistic and cruel offshoot. Their battles and power struggles are full of political intrigue and battles for survival. Another is the story of the Tau, a young and rapidly - expanding race with its own unique ideology, and how they interact with the other races in the 40K universe.
One interesting concept could be the evolution of the factions. For example, how the Space Marines might have developed new combat tactics or even new genetic enhancements. Another could be the exploration of new planets and the strange alien species that might be discovered. Also, the political intrigue within the Imperium could be a fascinating aspect, like the power struggles between different segments of the military or the Adeptus Terra.
Some interesting concepts in Warhammer 30k fanfiction include the loyalty and betrayal within the legions. There are stories that show how a single act of betrayal can have far - reaching consequences for an entire legion. The psykers in this setting also offer great potential for fanfiction. Their powers and how they are controlled or go out of control can be the focus of many stories. Additionally, the relationship between the Space Marines and the Mechanicum is another area that fanfiction often explores, with different takes on their cooperation and conflicts.
There might be a fanfiction where a group of Imperial Guardsmen encounter a Necron tomb world awakening. This story could explore the horror and confusion of the guardsmen as they face the ancient and powerful Necrons, and how they try to survive against overwhelming odds. It could also show the Necrons' view of the 'inferior' organic lifeforms.