Del Toro was incredibly close to shooting an adaptation of At The Mountains of Madness in 2011, when Universal shut the project down. They decided they weren't going to risk a $150m budget on an R rated for film which would probably need about $500m to break even.

A couple of years ago Del Toro shared a thirty second clip of pre-viz by Industrial Light and Magic. Another film to add to list of what couldn't been.

The Thing On The Doorstep

There was a (very) loose adaptation of The Thing on The Doorstep in 2023 - Suitable Flesh.

However it felt less like an adaptation of Lovecraft and more like an adaptation of Brian Yuzna/Stuart Gordon doing Lovecraft. Which isn't a bad thing - love Reanimator.

The intrinsic problem is the classic Lovecraft story is: scholar discoveries some terrible, ancient evil and goes mad or runs away. Thus doesn't lend itself to a big movie adaptation and the most successful Lovecraftian films have worn their inspiration lightly. I'd have loved to see what GdT did with MoM but I don't quite know how you could jazz it up for the general movie-going audience.