One common theme is the clash of two different worlds. Sherlock's world of logic and deduction is very different from the magical world of Harry Potter. So, fanfictions often explore how these two worlds can co - exist or conflict with each other.
Another theme is the exploration of different kinds of intelligence. Sherlock is extremely intelligent in a rational way, while the characters in Harry Potter have their own magical knowledge and intuition. Fanfics might show how these different forms of intelligence can be combined or compared. For example, how Sherlock's logical thinking can be applied to understanding magic, or how the magical characters can learn from Sherlock's methods. It makes for really interesting character development and plotlines. This can also lead to a theme of mutual learning, where both sides gain something from the interaction.
One common theme is mystery - solving. Just like in the original Sherlock Holmes stories, the fanfictions often have him using his deductive reasoning to solve magical mysteries in the Harry Potter world.
One common theme is the clash of different ways of thinking. Sherlock's logical, scientific mind against the magical and somewhat superstitious world of Harry Potter. For example, in many fanfics, Sherlock tries to explain magic using his own methods.
One common theme is mystery-solving. Since Sherlock is known for solving mysteries and there are always mysteries in the Harry Potter world, like the secrets of the Hogwarts castle or the identity of certain dark wizards. Another theme is the clash of different worlds. Sherlock's logical, Muggle - based world colliding with the magical world of Harry Potter.
A common theme is the exploration of power. Sherlock has his mental power and deductive abilities, while the Supernatural characters have powers like magic and the ability to fight demons. In fanfiction, they might combine their powers to face a greater threat. For example, Sherlock's ability to analyze a situation could help the Winchesters in a battle against a powerful supernatural entity, and the Winchesters' knowledge of the supernatural could help Sherlock understand things he couldn't before.
One common theme is the clash of their personalities. Sherlock's cold logic and Hannibal's refined and sometimes sinister charm create a lot of tension. For example, in many fanfics, they initially distrust each other due to their very different approaches to life and crime - solving.
Mystery is also a big theme. Since Sherlock is known for solving mysteries, fanfiction often has him using his skills to solve some big mystery in Middle - earth, like a disappearance or a strange occurrence that's affecting the Hobbits or the whole of Middle - earth.
One common theme is the comparison between the two Sherlocks. Writers often explore how the Benedict Cumberbatch - like Sherlock from the BBC show and the Jonny Lee Miller - based Sherlock in Elementary differ in their deductive methods and personalities. Another theme is the interaction between the side characters. For instance, how Watson from each show would get along or clash.
The idea of a bigger, overarching mystery that requires both the skills of Sherlock and the resources of NCIS is also a common theme. It might be a case that has roots in both the UK and the US, or something that involves a very elusive criminal that only their combined efforts can catch. This theme allows for a lot of exciting plot development and showcases the strengths of both universes.
One common theme is the clash of cultures. The ninja - like Akatsuki with their own values and traditions coming into the very different wizarding world of Harry Potter. Another theme is power struggles. Akatsuki members are often power - hungry in their own universe, and in the Potter world, there are different power dynamics with the Dark Lord and the Ministry of Magic.
One common theme is the clash of different worlds. For example, when Harry Potter is rescued in a crossover with another universe, like the Star Wars universe, there's a lot of focus on how the magic of Harry's world interacts with the technology and different species in Star Wars. It's about two very different concepts trying to coexist.