An interesting plot could be a love story between an XCOM operative and an Advent soldier who is starting to question the Advent's motives. This relationship could be complicated by the presence of the Chosen. Also, a story about the Chosen teaming up to overthrow the Elders who they believe are using them could be really engaging. There could be a lot of political intrigue and power struggles within the Chosen ranks in such a fanfiction.
A plot could revolve around a rookie XCOM soldier who has a special ability that catches the attention of all the Chosen. They each try to sway the soldier to their side, and the soldier has to navigate through their offers while remaining loyal to XCOM. Or perhaps a fanfiction set in a parallel universe where the roles of XCOM and the Chosen are reversed, and we see how the Chosen fight against an oppressive XCOM - like force.
Well, in the XCOM 2 War of the Chosen story, it's a complex tale. The Chosen are a big threat. They have unique abilities and can disrupt XCOM's operations. XCOM has to not only deal with regular alien forces but also these Chosen. They go on missions around the world to gather resources, rescue civilians, and take down key alien installations all while trying to outwit the Chosen who are constantly hunting them.
The main plot involves the XCOM forces fighting against the Chosen, who are powerful and strategic adversaries. They bring new challenges to the XCOM team, with unique abilities and tactics that XCOM has to counter in order to protect the Earth from alien threats.
Another theme is loyalty. The loyalty of the soldiers to XCOM, and sometimes the complex loyalties within the XCOM organization itself. For instance, when faced with the allure of the Chosen's offers, some characters may struggle with where their true loyalties lie.
In XCOM War of the Chosen fanfiction, some of the best characters are often the soldiers. They have unique personalities and skills. For example, a sniper with a backstory of being a hunter before joining XCOM can be really interesting. Their ability to stay calm under pressure and make those long - range shots is crucial in the story.
One idea could be having the XCOM soldiers use their combat skills in the Mass Effect universe. Maybe they are sent to help fight against the Reapers. They could introduce their unique tactics and weaponry to the Mass Effect races.
One idea could be a crossover with the Mass Effect universe. The Xcom soldiers could encounter some of the alien races from Mass Effect and have to work together or face off against them. Maybe the Xcom team has to deal with the Reapers in some way.
Squad members from XCOM are frequently used. For instance, characters with unique abilities like the Psi - Operatives. Their psychic powers can add an interesting dimension to the story. Also, characters who have a backstory that is hinted at in the game but not fully explored, such as a soldier who lost their family to the Advent. Fans like to flesh out these stories in fanfiction. And of course, any characters who have a particular rivalry or connection with the Chosen are also popular choices.
You could also focus on the technology aspect. Templars are used to a certain level of technology in their world. How do they react to Xcom's advanced weaponry and high - tech facilities? Do they see it as a means to enhance their own abilities, or are they skeptical? This exploration of the relationship between different technological levels can add depth to the fanfiction.
One plot idea could be a story where a soldier forms an unexpected bond with a captured Viper. Maybe the Viper shows signs of having a conscience, contrary to what the XCOM team initially thought. This could lead to a series of events where the XCOM team has to decide whether to trust this Viper or not.
The Commander is a key character, leading XCOM. The Chosen are also important as they are the main antagonists. And there are the soldiers in XCOM, each with their own skills and personalities.