One common theme is the clash of different technologies. In these fanfictions, you often see Destiny's space - age, almost magical technology pitted against Halo's more militaristic and hard - sci - fi tech.
One great 'destiny halo crossover fanfiction' is 'The Guardians in the Halo Universe'. It has an exciting plot where Destiny's Guardians find themselves in the Halo world and have to team up with the Spartans to fight a common enemy. The action scenes are well - written and the character interactions are really interesting.
For a more unexpected choice, you could have the Arbiter from Halo as one of the main characters. He has a complex backstory and his own code of honor. In a crossover, he could team up with a Hunter Guardian. The Hunter's brute strength combined with the Arbiter's strategic thinking would make for an exciting story as they face challenges in both universes.
One idea could be that the Master Chief from Halo is transported to the Destiny universe and has to team up with a Guardian to stop a new threat that is using technology from both universes. For example, the Covenant and the Fallen might be working together under a powerful new leader.
Another challenge is creating a plot that makes sense for both sets of fans. The story has to appeal to Destiny 2 fans as well as fans of the other game. If it's too focused on one side, the other group of fans might not enjoy it. For instance, if a crossover with The Elder Scrolls is too centered on Destiny 2 mechanics and doesn't incorporate enough of The Elder Scrolls' rich world - building, it could be a turn - off for Elder Scrolls fans.
Master Chief is often a popular character. Given his significance in the Halo universe, it's natural for him to be a central figure in crossovers. He has the skills and determination to face the Flood threat. Another one could be the Arbiter. His unique perspective as a former Covenant and now an ally in the fight against common enemies makes him an interesting addition in fanfictions involving the Flood.
The creation of a new threat or goal that unites the characters from different universes is important too. In a Halo Reach and Destiny crossover, a powerful new alien race could be the common enemy that forces the Guardians and Spartans to work together. This gives a purpose to the crossover and drives the story forward as they have to combine their skills and resources to face this threat.
One possible plot could be that the Master Chief is somehow transported to the Avengers' universe. He teams up with Iron Man to stop a new threat that combines Covenant and Hydra technology. Their combined skills in combat and technology would make for an exciting adventure.
One interesting concept could be the crossover of Halo 5 characters with characters from other science - fiction universes. For example, seeing Master Chief interact with characters from Star Wars. It could lead to epic battles or unexpected alliances. Another concept might be the combination of Halo 5's technology with that of a different game world. This could create unique weapon combinations or new ways of traversing the game environment. Also, crossovers can explore different cultures within the Halo 5 universe and how they would react to an outside influence.
It's fan - made fictional stories that involve crossovers within the Halo universe. Usually, it combines elements from different Halo games, or sometimes even brings in elements from other related franchises. For example, a fanfiction might crossover the story of Halo with another sci - fi game's lore, creating unique and interesting plotlines.