The poster actually does show the monster. The mastermind is

>>83815304

My wife's son: The Movie

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>>83815304

>>83815334
i'm dying send halp

has it already leaked?

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>>83815334

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>>83815334

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>psychological horror

>>83815850
The dog did it. No bullshit.

>>83815334
First time that shitty forced meme made me laugh.

Theories on what happened?

I thought there was no "monster".

What comes at night are the nightmares.

The door was opened by either Andrew or Travis who dragged Stanley (the dog) inside. Then whoever did caught the disease from Stanley and spread it to the other(s).

And the ending is obvious: Everybody was shown having symptoms, so they all died eventually.