Yes, there are limitations. Often, the game will restrict when and how you can perform brutalities in story mode. For example, it might only be possible at certain points in a fight or against specific opponents. This is to keep the story flow intact and not make it too chaotic. Also, some characters might have more difficult requirements to perform their brutalities compared to others in the story mode.
Yes. Different Mortal Kombat installments handle this differently, but generally, there are opportunities to do brutalities in story mode. These brutalities can range from simple and quick executions to more complex and elaborate ones. They are a big part of what makes Mortal Kombat's combat so visceral and engaging, and having them in the story mode helps to blend the gameplay and the narrative together more effectively.
Title: 'The Clash of Titans: MK vs Street Fighter'. In this fanfiction, Ryu from Street Fighter finds himself in the Mortal Kombat realm. He's shocked by the brutal nature of the battles there. He meets Scorpion, and at first, they are hostile. But as they realize they both fight for justice in their own ways, they decide to team up against a common enemy, Shang Tsung, who has plans to invade both their worlds. They combine their fighting styles, Ryu's Hadoken mixing with Scorpion's Spear, creating a new and powerful attack to defeat Shang Tsung.
Kitana is another fan - favorite. Her grace and deadly fighting skills can make for some fascinating reactions. Fanfiction might focus on how male characters are attracted to her while also respecting her as a powerful warrior, or how other female characters react to her beauty and strength.
One interesting story could be about a new character's reaction to the brutal battles in Mortal Kombat. They might be initially shocked but then find their own strength and determination to fight. For example, a young warrior from a peaceful realm who has to quickly adapt to the gore and intensity of Mortal Kombat.
RWBY would probably have a range of reactions. Ruby, being the adventurous one, could find inspiration in the Mortal Kombat fanfiction for new ways to use her Crescent Rose. Weiss may compare the fanfiction's lore to her own knowledge of Remnant's history and find it lacking or fascinating depending on how it's written. Blake, with her love for stories, would get immersed in the tales within the fanfiction. Yang would enjoy the high - energy and often brutal combat described, and might even want to test out some of the moves in sparring sessions.
Well, the canon status of MK comics isn't straightforward. It might be canon within certain story arcs or universes, but not across the board. Different interpretations and continuities can come into play.