This is the list of all the keys collected so far...
Key to Wonderland (Alice in Wonderland, Animated Version 1951)
Lady Tremaine’s Key to the Attic (Cinderella, Animated Version 1950)
Key to Hamunaptra (The Mummy, 1999)
Supernatural Colt Revolver (Supernatural, Episode 2.22)
Temple Key (The Fifth Element, 1997)
Strange’s Sling Ring (Doctor Strange, 2016)
Motel Key & Bus Ticket (The Lost Room, 2006)
Staff of Ra Headpiece (Raiders of the Lost Ark, 1981)
Crystal Skull (1:6) (Indiana Jones & the Kingdom of the Crystal Skull, 2008)
Dumbledore's Deluminator (Harry Potter and the Deathly Hallows, Part 1, 2010)
Pan’s Key to the Fairy Kingdom (Pan, 2015)
Reverse Flash Ring (The Flash, Episode 1.9)
Four Horsemen Rings—Keys to Lucifer’s Cage (Supernatural, Episode 5.22)
Gameboard Key (Zathura, 2005)
Sonic Screwdriver (10th Doctor Who, 2006–2008)
Sonic Screwdriver (13th Doctor Who, 2018–)
Crystal Shard (The Dark Crystal, 1982)
House of El Command Key (Man of Steel, 2013)
Power Plant Key (City of Ember, 2008)
Music Box Necklace Key (Anastasia, 1997)
Hofund: Heimdall’s Sword (1:12 scale) (Thor, 2013)
Other Mother Door Key (Coraline, 2009)
Cosmic Key (Toy Version) (Masters of the Universe, 1987)
Men of Letters Bunker Key (Supernatural, Episode 8.12)
Lovecraft’s Silver Key (Warehouse 13, Episode 4.2)
Fortress of Solitude Crystal (Superman, 1978)
Voltron Keys (Toy Versions) (1984–1985)
Hal9000 Memory Deactivation Key (2001: A Space Odyssey, 1968)
Vault 687 Key (Harry Potter and the Philosopher’s Stone, 2001)
TriWizard Cup (Harry Potter and the Goblet of Fire, 2005)
Laputa Stone (Castle in the Sky, 2003)
Assassin Coin (John Wick 2, 2017)
Anorak’s Three Gate Keys (Ready Player One, 2018)
Rose’s Medallion (The Last Jedi, 2017)
Infinity Gauntlet (Avengers: Infinity War, 2018)
Amulet of Daylight (Trollhunters, 2016–2018)
Heart of Ahriman Crystal (Conan the Destroyer, 1984)
Magic Button Key to the Neitherlands (The Magicians, 2015–2017)
Ophelia’s Key to the Pale Man’s Lair & Magic Chalk (Pan's Labyrinth, 2006)
Esteban's Medallion (Mysterious Cities of Gold, 1983/2012/2016)
Safety Deposit Box Key (The Da Vinci Code, 2006)
Keystone Cryptex (The Da Vinci Code, 2006)
Stormbreaker (Avengers Infinity Wars, 2018 and Endgame, 2019)
Red/Blue Pill (The Matrix, 1999)
Gummi Bears Medallion
Seven Golden Keys (The Magicians, 2015–2017)
Key to Hell, Ankh Key (Sandman / Locke & Key)
Locke & Key: 2", Alpha, Angel, Animal, Anywhere, Biblio, Chain, Echo, Enigma, Gender, Ghost, Grindhouse, Harlequin, Head, Hercules, Matchstick, Mending, Mirror, Moon, Music Box, Omega, Orchestra, Owl, Philosophoscope, Realikey, Shadow, Small World, Snow Angel, Splodey, Stamp, Teddy, Tempus Fugit, Thorn, Timeshift, Trident, Undertree, Whispering Iron, …
Elizabeth’s Cage/Songbird Key (Bioshock: Infinite, 2013)
Francis Drake’s Ring (Uncharted 3, 2011)
Keyblades (Kingdom Hearts, 2005)
Avery Recruitment Coin (Uncharted 3, 2011)
Phurba Dagger (Uncharted 2, 2009)
Lost City of Atlantis Crystal
Tesseract
Tomorrowland Pin
Flying Key from HP
Time Machine Control Lever (Both Versions)
Demon Knight Key
William’s Prison Keys
Subtle Knife
Andromeda Self Destruct Keys
Hofund (Full Size)
The Craftsman's Key (The Room, 2015)
Voltron Lion Key
Wonka’s Inventing Room Key
Locke and Key - Future Releases
10th Doctor Tardis Key
The Room Eyepieces [X]
Thern Medallion
Cradle of Life Orb
Key to Oz (Supernatural)
Lylesberg’s Berzerker Key
7 Wizard Keys of Oz
Eye of the Dragon Crystal
Carolinus’ Last Realm of Magic Key [X]
Heartstone Horngazel
Mirrormask Key
Elizabeth’s Lighthouse Key [X]
Galileo’s Journal Crystal
Papa Song’s Storage Room Key
Hellboy’s Right Hand of Doom [X]
Elder Scrolls Skeleton Key [X]
Atlantis Discs: Sun, Moon, World (Indiana Jones & the Fate of Atlantis, 1992) [X]
[X] = I have what I need to make this, but don't want to commit to getting it started yet.