A story could revolve around a virus that infects the ship's computer system. This virus is so advanced that it seems almost alive. The crew has to use their knowledge of both technology and biology to combat it. Also, an idea could be a Star Trek story set in a parallel universe where the Federation has a completely different set of values and goals. The main crew has to navigate this strange new world and decide whether to try to influence it to be more like their own universe or leave it be. Then there's the idea of a lost Starfleet colony that has developed its own unique culture over the years. The Enterprise crew discovers it and has to deal with the differences and similarities between their cultures.
Another interesting fanfiction could be an alternate Star Trek where the Borg are not the menacing force they are in the original. Maybe they are a more peaceful, misunderstood species that the crew of the Enterprise has to help protect from other threats in the galaxy.
One idea could be a fanfic where Q takes a young Starfleet officer under his wing and shows them different timelines and alternate universes. It would be interesting to see how the officer reacts to all the chaos and knowledge Q presents. Another could be a story where Q is in love with a human from the Enterprise crew and has to navigate his omnipotent powers while dealing with human emotions.
One idea could be that the crew of the Enterprise discovers a distress signal from a Star Blazers ship. They then team up to fight a common enemy, like an alien race that is threatening both their galaxies. The different technologies and cultures would create an interesting dynamic.
One interesting idea could be the exchange of technology. For example, the Star Trek's transporter technology might be introduced into the Star Wars universe, changing the way characters travel between planets. Another could be a character crossover, like having Captain Kirk meet Darth Vader. It would be fascinating to see their different leadership styles and moral compasses clash or, perhaps, find common ground.
Well, in some fanfiction, there are crossovers that involve character swaps. For example, Captain Kirk finding himself in the Star Wars universe and having to navigate the politics and power struggles there. He might use his charm and quick - thinking from the Trek universe to make an impact. Another concept could be the Jedi and Vulcans sharing their knowledge of the Force and logic respectively. The Jedi could learn about strict emotional control from the Vulcans, while the Vulcans might be intrigued by the concept of the Force.
One interesting idea is the combination of Star Wars' Force with Star Trek's technology. Imagine Jedi using their Force abilities to interact with Star Trek's advanced consoles or warp drives. Another is the meeting of iconic characters like Luke Skywalker and Captain Kirk. They could learn from each other's leadership styles and approaches to conflict. Also, the different species from both universes coming together, such as Wookies and Vulcans, and how they'd interact culturally.
One interesting idea could be the technology exchange. For example, the Star Trek's warp drive might be compared or even combined with the Star Wars' hyperdrive in some creative ways. Another could be the meeting of characters. Imagine Captain Kirk facing off against Darth Vader. It would be a clash of two very different leadership styles and moral compasses.
One interesting Star Trek story is the encounter with the Borg. Their hive - mind and assimilation concept were really fascinating and terrifying at the same time. They represented a huge threat to the Federation.
There are potentially unused stories that revolved around unique alien species. Perhaps a species that communicates solely through musical frequencies. However, the writers might not have been able to fully develop this idea within the framework of the existing Star Trek universe. Or there could have been a story about a Star Trek ship getting lost in a dimension where the laws of physics are completely different, but it was abandoned as it was too difficult to explain clearly.
One interesting idea could be the interaction between the different alien species from both universes. For example, seeing how Vulcans from Star Trek would interact with the Minbari from Babylon 5. Maybe they would exchange knowledge on logic and philosophy.