One characteristic is the focus on Abathur's unique biology. Since he is a genetic manipulator in the StarCraft lore, many fanfictions explore his experiments and creations in detail. For example, they might describe how he combines different genetic materials.
SC2 HOTS's story is centered around Kerrigan. She's a complex character. At the start, she's in a state of flux between her human past and her Zerg - influenced present. The game shows her transformation back to the powerful Queen of Blades. She wages war against Mengsk, who had wronged her in the past. The Zerg follow her lead as she makes strategic moves against the terrans. Along the way, there are interactions with the protoss as well. The story is about Kerrigan reclaiming her power and seeking vengeance while also determining the future of the Zerg race in the StarCraft II universe.
Well, 'abathur crossover fanfic' is a type of fan - created content. Usually, Abathur has his own characteristics and story within his original context. In a crossover fanfic, the writer might take those aspects and blend them with elements from another IP. For example, if it's a crossover with a fantasy IP, Abathur's unique biology or abilities could interact in really strange and cool ways with magic or different species from that other world.
There is a fanfiction called 'Abathur: The Hidden Power'. It focuses on the hidden powers that Abathur might possess but has not yet fully utilized. It's a great exploration of his character. And 'Abathur in the Time of Crisis' is also worth reading. It shows how Abathur reacts during a major crisis in the StarCraft universe and how his decisions can turn the tide of events.
Perhaps one key element could be her powers. If she has unique abilities, that would be a major part of her story. For example, if she can control certain elements or has strong combat skills.
I'm not entirely sure which specific 'Hots Orphea' story you are referring to. There could be many interpretations or versions. It might be a story within the Heroes of the Storm universe. Maybe it's about Orphea's origin, her powers, and her adventures in the game world. Without more context, it's hard to provide a detailed story.
Sorry, I'm not aware of specific 'abathur crossover fanfic' titles off the top of my head. But you can try searching on fanfic - dedicated websites like Archive of Our Own or FanFiction.net. Use the search terms 'abathur crossover' and you should be able to find some works that might interest you.
Well, in the story of SC2 HOTS, Kerrigan is the key figure. Once a terran, now a Zerg - influenced entity. Mengsk's betrayal set her on a path of vengeance. She begins to assert her control over the Zerg, which are in a state of change. She launches attacks on Mengsk's terrans. As she does this, the protoss also factor into the equation. There are battles, strategic moves, and a whole lot of drama as Kerrigan tries to rewrite her story and the fate of the Zerg in the StarCraft II setting.