There could be a 'Blackbird Fly' Sherlock fanfic where the blackbird is a metaphor for a case. Maybe it's a case that seems to elude Sherlock at first, just like a blackbird is hard to catch. As he delves deeper, he realizes that the key to solving it lies in understanding the 'flight' or the pattern of the mystery, much like predicting the path of a flying blackbird.
One interesting 'Blackbird Fly' Sherlock fanfic could be one that explores Sherlock's relationship with the concept of freedom symbolized by the blackbird. It might show how his mind, which is often caged by his own intellect and the mysteries he solves, could be set 'free' in an unexpected way.
I'm not sure of a specific 'Blackbird Fly' Sherlock fanfic with a unique plot off the top of my head. But a unique plot could involve the blackbird being a time - traveling device in Sherlock's world. It takes him to different eras where he has to solve mysteries that are somehow related to the present - day cases he's working on.
The blackbird could also be a messenger. In some magical lore, birds carry messages between different realms or people. So in the context of a Harry Potter fanfic, it could be bringing an important message to a character, perhaps a warning about an upcoming danger or a clue to solve a mystery.
Another one could be 'A Female's Perspective on 221B Baker Street'. This fanfic might be more about a female character observing Sherlock and Watson's daily lives at 221B. It could explore her thoughts on their habits, the cases they take on, and how she might secretly be involved in some of the background aspects of the cases without their knowledge.
Some Sherlock crossover fanfics that are well - liked include the ones that cross with the 'MCU' (Marvel Cinematic Universe). Imagine Sherlock Holmes trying to figure out the science behind the superpowers of the Avengers while also solving a mystery that ties into their world. Then there are crossovers with 'Sherlock Holmes in the 22nd Century'. It could be interesting to see how the classic Sherlock interacts with his futuristic counterpart in a fanfic.
One way is to have it as a guide. For instance, a young wizard or witch could be lost in a forest near Hogwarts, and a blackbird flying overhead could lead them to safety, like to a hidden passage or an old, forgotten hut that holds some important magical item.
One great Sherlock OC Reichenbach fanfic could be 'The Fallen Detective's Redemption'. It delves deep into the aftermath of Reichenbach, with an original character who helps Sherlock in his journey back from the supposed death. The OC has a unique backstory that ties in well with the existing Sherlock lore.
A really popular one is 'The Modern Reimagining of Sherlock'. This fanfic updates the classic Sherlock stories to the present day in a really creative way. It includes modern technology and new twists on the old characters, making it a fascinating read for any Sherlock fan looking to pass the time.
One interesting 'Sherlock meets Sherlock fanfiction' story could be where two different versions of Sherlock from alternate universes meet. They might initially be in conflict as they both think their methods are superior. For example, one Sherlock could be more tech - savvy while the other relies more on traditional deduction skills. Another story could involve a young Sherlock meeting an older, more jaded Sherlock. The young Sherlock might inspire the older one to regain his passion for solving cases. There are also stories where Sherlock meets a female version of himself, which often leads to interesting character dynamics and re - evaluations of his own identity.
One interesting SR 71 Blackbird story is about its incredible speed. It could fly at over Mach 3. This made it extremely difficult for enemy missiles to catch it. Pilots had to wear special suits due to the extreme conditions at that speed.
One interesting Sherlock story is 'A Scandal in Bohemia'. In this story, Sherlock Holmes tries to retrieve a photograph from Irene Adler. She outwits him at first, which is quite remarkable as Holmes is usually the one outsmarting others.