Man, I have never done this in any previous years and am excited! Trying to keep it to mostly new watches, but we will see as I construct the list.

6 countries -
The House That Jack Built (Denmark)
The Orphanage (Spain)
Shutter (Thailand)
Noroi: The Curse (Japan)
Tumbbad (India)
Triangle (Australia)

8 decades -
Speak No Evil (2020s)
The Wailing (2010s)
Dark Water (2000s)
Braindead (1990s)
Manhunter (1980s)
The Bird With the Crystal Plumage (1970s)
What Ever Happened to Baby Jane? (1960s)
Rodan (1950s)

2 insect centered films
The Fly (1958)
Arachnophobia

1 horror film set in space or the future (relative to when it was released)
Life (2017)

2 animated films
Wicked City
Seoul Station

1 bloodthirsty old person/people film
The Taking of Deborah Logan

2 1970s regional US films (Thanks Sean Young)
I Spit On Your Grave
Let's Scare Jessica to Death

The worst horror sequel from the 1990s that you haven't seen and can access. (I realize that this will take a little work)
From Dusk Til Dawn 2: Texas Blood Money

1 German Silent
The Cabinet of Dr. Caligari

5 Films from David Cronenberg, Ti West, Bill Rebane, Charles B. Pierce, William Grefe and/or Joy N. Houck Jr.
Blood Harvest
The Giant Spider-Invasion
The Legend of Boggy Creek
Mako: The Jaws of Death
Creature from Black Lake

2 Christopher Lee films
Dracula (1958)
Extraordinary Tales

1 film with a musician or band in it (A real life musician or band)
Studio 666 (2022)

1 Stephen King adaptation that is not the first go around.
Misery (1990)

1 Lon Chaney film. (NOT JR)
The Phantom of the Opera (1925)

And 1 Tobe Hooper Film (There must ALWAYS be a Hooper film)
The Funhouse

Also watching The Last Circus, Silent Madness, and Pennywise: The Story of IT