Maybe the 'darhkness' is spreading like a plague, infecting people's minds and turning them against the heroes. So, the heroes not only have to fight the physical manifestations of the 'darhkness' but also find a way to save the infected. This could lead to some interesting character arcs, especially for those who are close to the infected.
One possible plotline could be that the 'darhkness' is a new super - villain or an ancient evil that has been awakened. The Arrow team has to find a way to defeat it using their skills and newfound powers or technology.
The 'the war on darhkness arrow fanfiction' might be about a fictional war within the Arrow universe against a character or concept named 'Darhkness'. It could explore themes like heroism, the fight between good and evil, and the development of characters as they face this new threat.
One possible plotline could be that Felicity discovers she's pregnant just as a major new threat emerges in Star City. This creates a dilemma for her as she wants to help the team but also protect her unborn child.
In a Crusade Arrow fanfic, a possible plotline could be a race against time. The arrow is slowly losing its power, and the only way to recharge it is to take it to a specific and far - away location. The characters must brave all kinds of obstacles, including natural disasters and enemy attacks, to reach the place in time. Another plotline could be a mystery. The Crusade Arrow has been stolen, and the main character, a detective - like figure, has to solve the mystery of who took it and why. As they dig deeper, they uncover a web of secrets and lies that are all connected to the arrow.
There could be a plot where a wolf with special powers is hunted by other packs during the war because they fear his power. Or perhaps a story about a female wolf leading her pack to victory against all odds in a male - dominated wolf - war society. This would involve her facing discrimination at first but then proving herself through her strategic skills and courage. The fanfiction could also explore how the war changes the landscape and the hunting grounds of the wolves, and how they have to adapt to these changes in their plotlines.
One possible plotline could be that it's a moment of celebration. Maybe the team has just achieved a major victory against a big bad in Star City, and in the heat of the moment, Sara and Felicity share a kiss. It could be a spontaneous display of friendship and relief.
One plotline could be Buffy being sent back in time to the Korean War and having to fight both the normal human enemies of the war and some supernatural threat that has emerged because of the chaos of the war. Another could be that a vampire or demon from the Buffyverse somehow gets involved in the war on the side of one of the combatants.
One possible plotline could be that Felicity gets hurt during a cyber - attack. Hackers target her while she's trying to protect Star City's network. As she battles them, they manage to send a virus that causes physical harm through her tech interface. Another could be she gets caught in the crossfire of a fight between Arrow and one of his villains. Maybe the villain uses her as a hostage and in the struggle to free her, she gets injured.
A great plotline in Arrow fanfiction could be the introduction of a new group of anti - heroes. They initially clash with Oliver and his team but then end up joining forces to take on a bigger threat. This could lead to some really interesting character development and power dynamics. There could also be a story where Oliver loses his memory and has to rediscover who he is while still being hunted by his enemies. Or a plot where Felicity creates a new technology that gives the team an edge in combat, but it also comes with some unforeseen risks.
Perhaps in the fanfiction, Ginny becomes a professional Quidditch player after the war, while Harry focuses on training new Aurors. Their relationship could be strained by their busy schedules, but they eventually find a balance. They also might have to deal with the remaining Death Eaters who are still causing trouble.
One possible plotline could be Harry struggling to keep his pregnancy a secret while still being involved in the war efforts. He might have to deal with the physical and emotional challenges of pregnancy in a dangerous and chaotic environment.