I like 'Buffy in the SGC'. In this fanfic, Buffy is somehow transported to the Stargate Command. The author does a good job of showing how Buffy's slayer skills are both useful and a bit out of place in the military - science - fiction setting of Stargate. There are some really cool fight scenes against Goa'uld with Buffy leading the charge.
One common theme is the clash of different worlds. Buffy's world of demons and magic and Stargate's world of aliens and advanced technology. Another theme could be the exploration of power. How the powers of the Buffy characters like slayers compare to the military might and technology in Stargate.
Sure. Many Buffy Stargate crossover fanfictions exist. They often explore character relationships as well. Imagine Spike from Buffy having a run - in with Colonel O'Neill from Stargate. It could lead to some really interesting and humorous exchanges. Also, the fanfictions might bring in elements from different seasons of both shows to create a unique narrative.
In crossover fanfiction, Buffy's world is centered around magic, demons, and the supernatural. Stargate SG1 is more about science - fiction elements like advanced technology and alien races. When they cross over, the differences create interesting conflicts. For example, Buffy might rely on her slayer instincts, while SG1 might try to use their technology to solve a problem.
The theme of cultural differences is quite prevalent. Buffy's world is based on a more modern - day Earth with a hidden supernatural side, while Stargate involves different planets and cultures. Fanfictions play with how the characters from Buffy would adapt to the alien cultures in Stargate and vice versa. Additionally, the theme of friendship and loyalty is strong. We see how the characters from both shows build new relationships or strengthen existing ones when they cross over. For instance, Willow could form a bond with Samantha Carter as they both are intelligent and resourceful women in their respective shows.
First, you need to be really familiar with both universes involved in the crossover. For Stargate, know the different gates, the Goa'uld, and the various teams. Then, come up with an interesting premise. Maybe it's a new enemy that can only be defeated by the combined forces of the two universes in your crossover. Keep the characters true to their original personalities.
A Stargate and Battlestar Galactica crossover can also be amazing. Picture the Stargate teams dealing with the Cylons. The fanfiction often explores how the military strategies from both franchises would clash or blend. It usually has a lot of action - packed scenes as well as some deep character - driven moments.
A possible fanfiction could revolve around a joint mission. The races from Babylon 5 and the teams in the Stargate universe come together to face a common threat. Maybe an ancient evil that has the power to destroy both their worlds. They would have to combine their knowledge and resources, like the Psi Corps abilities from Babylon 5 and the Ancient technology in Stargate.
One idea could be that a Sentinel's enhanced senses are used to detect a hidden Goa'uld base that the Stargate team has been searching for. The Sentinel could sense the unique energy signatures or the presence of the symbiotes in a way the normal technology couldn't. Another idea is to have a Sentinel character be accidentally transported through the Stargate to a different planet. There, they have to use their Sentinel abilities to survive and team up with the Stargate team members who are also on a mission there.
A great Stargate crossover fanfiction has to have well - written characters. For example, if it's a crossover with Star Trek, the Stargate characters should retain their original personalities while still being able to interact meaningfully with the Star Trek characters. Another factor is the plot. It should be engaging and make sense within the context of both universes. For instance, if it's a crossover between Stargate SG - 1 and Stargate Atlantis, the plot should involve a threat or mystery that requires the combined efforts of both teams. And the world - building has to be on point too. It should blend the different elements of the two Stargate shows (or other shows in a crossover) seamlessly, like how the technology and cultures interact.