A crossover with the Halo universe might also be fascinating. The UNSC could exchange military tactics with the Brotherhood of Nod. For example, the Spartans could learn some guerilla warfare techniques from Nod's stealth units, while the Brotherhood could benefit from UNSC's advanced vehicle designs.
Another interesting concept is to cross it with a post - apocalyptic world like 'Mad Max'. The desolate landscapes and the fight for resources in 'Mad Max' could be combined with the military strategies and factions of Command and Conquer. The Nod could be like the warlords in the 'Mad Max' world, trying to control the remaining resources using their stealth and guerilla tactics.
A possible plot is that Naruto discovers a strange portal that leads to the world of Command and Conquer. He teams up with some of the game's factions to learn their combat strategies and bring them back to the ninja world. He could then teach his friends how to use these new tactics, like building fortifications and using combined arms warfare. Or perhaps there is a villain in the Command and Conquer world who wants to invade the ninja world, and Naruto has to lead the defense using a mix of his ninja skills and the new technology he has learned.
One interesting Command and Conquer fanfiction could be those that explore the backstories of the various factions in more depth. For example, a fanfiction might focus on the Tiberium-infested world from the perspective of a small group of survivors trying to make a living. Another could be about the internal politics and power struggles within the Brotherhood of Nod. There are also fanfictions that might rewrite key battles in the Command and Conquer universe, giving a different outcome and exploring how that would change the overall storyline.
First, decide which universes you want to cross over. Then, research both. For example, if it's a Command and Conquer and Warhammer 40K crossover, learn about the factions, their goals, and their technologies in both. Next, come up with a central conflict that would bring these different universes together. Maybe it's a Chaos incursion in the Command and Conquer world.
Well, one interesting aspect could be the unique interpretations of the 'Command and Conquer' universe. Fanfics often explore different storylines that the original game might not have delved into deeply. For example, they might focus on the backstories of minor characters or create new relationships between the existing ones. Another aspect could be the creativity in the use of the game's elements, like how the different factions interact in new and unexpected ways.
One common theme is the clash of different powers. In RWBY, the characters have unique abilities like semblances, and in Command and Conquer, there are various military units and technologies. Fanfictions often explore how these powers interact when the two universes collide.
Well, these fanfics are interesting as they often introduce new scenarios that the original games might not have fully explored. They can combine different elements from the various 'Command and Conquer' titles. Say, a fanfic could merge the Tiberium - based storylines with the Red Alert time - travel concepts. Also, the characters in the fanfics can be developed in ways that make them more relatable or complex. The fanfic writers can give backstories to the commanders and soldiers, making the overall story more engaging.
One interesting storyline could be the discovery of a new type of Tiberium with unique properties. This could lead to a race between the factions to control and study it. For example, the GDI might see it as a way to finally eradicate Tiberium, while the Brotherhood of Nod could want to use it to enhance their forces. Another storyline could focus on the personal journey of a soldier caught in the middle of the war, dealing with the moral and ethical dilemmas of fighting in a conflict that is so deeply intertwined with a dangerous and mutagenic substance like Tiberium.
One great 'Command and Conquer' fanfic is 'Rise of the Brotherhood'. It explores the backstory of the Brotherhood in an exciting way. Another one could be 'Tiberium Wars: Untold Tales' which focuses on the lesser - known aspects of the Tiberium Wars. There's also 'Red Alert: Alternate Timeline' that presents an interesting alternate take on the Red Alert universe.
One of the main themes is survival. In the OC universe of 'Command and Conquer', the environment can be harsh and full of enemies. Characters need to find ways to survive. Another common theme is the exploration of new areas. Fanfiction often takes readers to uncharted regions in the OC world, uncovering new resources and threats. And of course, there's the theme of heroism, where characters rise up to face great challenges and save the day in the OC setting. It can be really inspiring to read about these heroes in the fanfiction.