Well, perhaps they meet in a virtual realm created by some advanced alien technology. Glados, with her cold and calculating nature, is initially suspicious of Cortana. Cortana, being more empathetic in a way, tries to make peace. They then find that they both have a common goal of protecting their respective universes from chaos. So they combine their unique abilities, Glados' control over physical test chambers and Cortana's combat strategies, to create a new form of defense mechanism.
A plot could involve Glados and Cortana being accidentally merged together due to a scientific experiment gone wrong. At first, they struggle to coexist within the same digital space. Glados is used to being in complete control, and Cortana is used to working with a human partner. But as they adapt, they discover new and enhanced abilities. They start to explore different digital landscapes together, facing various digital entities that oppose them. Along the way, they also learn about each other's pasts and the values of their original worlds.
In my opinion, Glados would be more dominant initially. She has a very strong will and is extremely protective of her territory in the Portal universe. She's used to manipulating everything around her in the test chambers. But Cortana is no pushover. As the story progresses, Cortana could gain more influence, especially if there are combat - related situations where her skills shine. So it really depends on how the story unfolds over time.
One common theme could be the clash of different personalities. Glados is often cold and calculating, while Q can be mischievous. So, the interaction between their personalities can be a major theme.
The plot could involve Cortana being turned into a human as part of a top - secret project. Once human, she realizes that she has lost some of her super - computing abilities but has gained intuition. She starts to explore her newfound senses, like taste and touch. She could get involved in a mystery that only she, with her unique perspective from being an AI, can solve. This mystery could be related to a threat against humanity that she discovers through her old AI connections, and she uses her new human skills to fight against it.
One plot idea could be Cortana getting trapped in a virtual reality world created by a rogue AI. She has to fight her way through various digital obstacles and enemies while trying to find a way back to the real world. Another idea is that Cortana discovers a long - lost part of her code that gives her new abilities and she uses these to protect humanity from a new threat. Maybe Cortana could also time - travel to different points in the Halo universe's history and change certain events to save more lives.
Well, it could be about Cortana getting glitched in a virtual world. In this fanfic, the lemon part might refer to a spicy relationship she develops with an AI from another system. They could be rivals at first, but then as they interact more, they start to have feelings for each other. Maybe they have to work together to fix the glitches in both their worlds.
One possible plot could be that Sesshomaru, while traveling through different dimensions, ends up in the Naruto world. He might initially be seen as a threat and have to fight some of the ninja. But then, he could encounter Naruto, who is curious about him instead of being hostile. They could team up to fight a common enemy, like an Akatsuki member who has a new, powerful jutsu that could endanger both their worlds.
One possible plot could be that Daredevil and Batman initially clash due to their different methods of fighting crime in Gotham. Daredevil, with his heightened senses, might perceive Batman's more stealthy and high - tech approach as too cold. However, as they face a common enemy, like a powerful and elusive criminal syndicate that operates both in Hell's Kitchen and Gotham, they start to respect each other's skills. They could combine Daredevil's street - level combat knowledge and Batman's strategic planning to take down the bad guys.
One possible interesting plot could be that Naruto and Gaara have to team up to face a new and powerful enemy from a far - off land. This enemy has a unique jutsu that can disrupt the chakra of an entire village. Naruto and Gaara, with their different but complementary skills, must learn to work together more closely than ever. Naruto's ability to make friends and inspire people could help them gain allies, while Gaara's powerful sand control provides strong defense and offense.
One possible interesting plot could be Naruto and Boruto getting transported to a parallel dimension where their roles are reversed. Boruto has to deal with the challenges Naruto faced in the past, like fighting powerful villains without the advanced technology he's used to. Meanwhile, Naruto gets to experience the modern ninja world from Boruto's perspective, including the new ninja tools and different social dynamics in the Hidden Leaf Village.
Well, perhaps Spyro could find himself in Equestria and team up with Twilight Sparkle to save both their worlds from a common threat. Maybe a dark magic user is trying to drain the magic from both Spyro's world and Equestria, and they have to combine their unique skills to stop it.