First Theory: Breath of the Wild.
There’s something beautiful about how Tolkein’s worlds are mostly full of empty lands. Even “settled” lands are often sparesely populated areas like Rohan or Bree, with the occasional town or village.
This vibe reminded me of something, and then I realized: This is what the Hyrule of Breath of the Wild feels like. Then I realized something else: Breath of the Wild is clearly a thinly-veiled reskin of the Silmarillion. Consider:
The story takes place in a generation after a great battle (originally, Nirnaeth Arnoediad), in which the dark power won. The land is now mostly empty, and overrun with monsters. The North/Centre is dominated by a tall, dark castle full of sleepless, dark vigilance. There are still a few safe places. The lost woods are Doriath – protected by a guardian who spread a veil of shadows and confusion to protect the borders of the land. Classically, Link was adopted and raised by the Deku tree, like Turin was by Thingol. Zora’s domain is Gondolin: A carved, beautiful city, hidden on a flat plain/lake surrounded by cliffs and mountains.
Before we do the rest of the geography, let’s talk about history: a generation ago, we had the great battle in which evil overran the land. But long before that, in ancient times, the good people came from a faraway, magical civilization with untold wonders of craft and magic. This obviously represents Valinor. However, in the last battle, their craft was turned against them, and they were defeated by treachery. This clearly represents the silmarils’ captured by Morgoth (evil captures source of ancient wonder), causing the oath of Feanor to turn against and destroy the Noldor.
Back to geography: On the shores of the great sea, there is a lighthouse laboratory, inhabited by the eldest hylian, which is Link’s strongest connection to the ancient magic. This represents the havens of Cirdan (oldest elf in middle-Earth), and their connection to Valinor. The Gorons represent Nargothrond (Mountain stronghold under the shadow of a fire dragon, source of many gems, dwarvish elements). The Gerudo represent the lands of the sons of Feanor – theoretically good guys but untrusting of strangers and outsiders. The treacherous Yiga clan lives in Gerudo lands, representing the treachery of the oath of Feanor (in particular, Celegorm and Curufin).
The icy mountains of the northwest represent Dor-Lomin, and are occupied by monsters (much like how Dor-Lomin was occupied by Easterlings).
Now to the characters:
Link is Turin: A deadly warrior wandering the occupied lands, defeating monsters wherever he goes but never ultimately conquering them. Like Turin (and unlike most storied warriors), he uses a variety of different weapons at different times. However, two items are strongly associated with him: A piece of armour inherited by his house since ancient times (for Turin, the dragon-helm of Dor-Lomin. For Link, the Hero’s tunic), and a cursed sword. The master sword, like Gurthang, comes from the vaults of Doriath/The Lost Woods. Like Gurthang, the master sword saps the life of its users (Gurthang ended up killing both of its wielders. The Master Sword requires a blood sacrifice to pick up).
Zelda represents Hurin: A hero and leader taken prisoner in the last great battle, who is now kept prisoner in the highest tower of Thangorodrim/Hyrule Castle. Despite her long imprisonment and curse, she defies Gannon/Morgoth still.
The one thing they did change was the end: Turin’s story has a downer ending, and the obviously couldn’t have that. So they grafted in the story of Earandil: Using the ancient power’s light (i.e. the light of Valinor, the silmaril), given to him by the female lead (Zelda now represents Elwing), the hero manages to summon the power of the ancients in order to defeat the great demon (although the land is still broken, and must be healed).
Second Theory: There should be a Feanor/Boromir buddy cop show.
Okay, this one isn’t so much a theory as a fanfic outline.
The concept is this: Feanor and Boromir, magically healed and sent through time to modern-day Detroit (Feanor through his body turning to Ash, Boromir by falling through a waterfall in a magic boat), end up becoming vitroilic BFF buddy cops.
Feanor is the smart, arrogant, genius cop who’s always figuring things up, tinkering around with crazy inventions and making bizarre (and illegal) modifications to their cruiser (“For the last time Feanor, flying cars violate FAA safety regulations!”). He used to think of mortals as beneath him, and is inclined to view criminals (and often his fellow officers) with instinctive contempt (of course, he often gets hit by this and has to learn better).
Boromir is the amusing opposite: Big, buff, boisterous bruiser, but all-around charismatic and a natural leader of men. While he’s definitely not the smart one of the pair, his natural charm and ability to befriend the working people of the city (both honest and criminal) make him a good counterpart to Feanor. He often defends men from Feanor’s criticism, while privately worried that Feanor may be right (and remembering all too well how he yielded to the temptation of the ring).
Maglor son of Feanor (played by Samuel L Jackson, reprising his role from Pulp Fiction) occasionally shows up, still chasing the last silmaril. While he’s happy to see his father again, Boromir (who knows all too well what it’s like to fall to temptation) convinces him not to tell his father about it, to help him avoid downfall. This charade is, of course, doomed to fail eventually, but hopefully Feanor will have learned enough about being a better person and the perils of seeking power by then that he won’t start another world war.