Guillermo del Toro Has Spent 'Roughly 16 Years' Writing Screenplays That Never Got FilmedQuote"By my count I have written or co-written around 33 screenplay features. Two to three made by others, 11 made by me (Pinocchio in progress) so- about 20 screenplays not filmed. Each takes 6-10 months of work, so, roughly 16 years gone. Just experience and skill improvement."
If I've obsessed over this right, these are del Toro's main unrealized projects –
Meat Market: A Love Story (Original screenplay)
Mephisto's Bridge (Based on the novel Spanky by Christopher Fowler)
The List of Seven (Based on the novel by Mark Frost)
The Left Hand of Darkness (Based on The Count of Monte Cristo)
At the Mountains of Madness (Based on the novella by HP Lovecraft)
The Wind in the Willows (Based on the novel by Kenneth Grahame)
Drood (Based on the novel by Dan Simmons)
The Haunted Mansion (Based on the Disney attraction)
Beauty and the Beast (Based on the fairy tale)
The Hulk TV Pilot (Based on the Marvel Comics)
Justice League Dark (Based on the DC Comics)
Fantastic Voyage (Based on the 1966 film)
The Buried Giant (Based on the novel by Kazuo Ishiguro)
The Coffin (Based on the Oni Press Comics)
The Champions (Based on the British TV series)
With these ultimately being made -
Pacific Rim 2 (2018, directed by Steven S. DeKnight)
The Witches (2020, directed by Robert Zemeckis)
Nightmare Alley (2021, directed by del Toro)
And no idea what these could be -
Secret Project (Untitled)
Superstitious