First, do some research on both the Xcom universe and the templar lore. Know their strengths, weaknesses, cultures, etc. Then, come up with a basic plot idea. For example, a group of templars could be accidentally transported to the Xcom world. After that, create your main characters from both sides and start thinking about how they'll interact.
To start an Xcom templar crossover fanfiction, think about the conflict that will drive the story. It could be an internal conflict within the combined group of templars and Xcom, like a power struggle or differences in ideology. Or it could be an external conflict, such as a new and dangerous alien threat that requires their combined efforts to defeat. Outline your story based on this conflict, and then start fleshing out the details as you write.
First, you need to be really familiar with both the Xcom 2 world and the world you want to crossover with. Know the characters, the settings, the rules. For example, if it's a crossover with Warhammer 40K, understand the grimdark nature of that universe and how Xcom's more tactical and strategic elements can fit in.
First, you need to be really familiar with both universes involved in the crossover. For example, if it's an XCOM and Halo crossover, know the weapons, characters, and settings of both. Then, come up with an interesting plot. Maybe XCOM is called to help the UNSC fight the Covenant. Next, start writing your characters. Give them distinct personalities and motives. Don't worry too much about making it perfect at first. Just get your ideas down on paper (or screen).
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.
Don't forget about the world - building aspect. Research the Xcom universe so your story fits in well. Include details about the technology, the relationships between different characters in Xcom, and the overall atmosphere of the war against the aliens. Also, read other Xcom fanfictions for inspiration and to see what works well in this genre.
First, you need to know the lore of the Templar of Twilight well. Read any official materials, if there are, or study other fanfictions to get a sense of the world, its rules, and the characters. For example, understand what makes a Templar unique in this universe.
First, you need to be really familiar with the XCOM universe. Know the different types of aliens, the technology in the game, and the characters. Then, come up with an interesting concept. It could be something like a new mission type or a different take on an existing character's story. Start with a basic outline of your plot, including the beginning, middle, and end.
To start a Kakuzu crossover fanfiction, you need to have a clear goal for the story. If it's a crossover with the DC universe, you could start with Kakuzu arriving in Gotham City. He might start causing chaos as he tries to amass wealth in this new, unfamiliar place. Think about how the existing characters in the DC universe, like Batman, would react to him. Build on these interactions, adding in elements of Kakuzu's backstory and motives to create a complex and engaging narrative.
First, you need to have a good understanding of the Asura lore. Know their culture, powers, and how they interact in their own universe. Then, choose the other universe you want to crossover with. Research that universe thoroughly as well. After that, think of an interesting plot point that could bring these two universes together. For example, a mysterious portal that connects the Asura world to the other.
First, decide which universe or character you want to cross Beerus with. This is crucial as it sets the tone and direction of your story. For example, if it's a crossover with the Naruto universe, think about how Beerus' powers would interact with ninjutsu. Then, create an interesting starting point. It could be Beerus accidentally landing in the Naruto world due to some sort of space - time rift.
You should also plan out the plot. Decide on a central conflict. It could be something like a common enemy that both sets of characters have to face. Maybe in a crossover with 'Zootopia', there's a villain who wants to disrupt both the human - like world of the descendants and the animal - centered Zootopia. Then, start writing an engaging introduction that hooks the reader right away.