It would be Seth Rogan dressed in Santa's clothing going, "heh, heh, heh," dropping weed down people's chimney for an hour and a half.
I can already see the bits:
First, he drops a dime bag down the chimney of the local DA. Now, "Santa" is wanted.
He also drops some down a chimney with a fire burning, so the decompressing parents immediately get a contact high.
While flying over Russia, he narrowly avoids rockets after realizing they're not fireworks.
Also, the slay gets grounded because people don't have "Christmas spirit," so he ends up getting pulled over by the police in a christmas slay.
Seth Rogan almost gets arrested until they realize he's "actually" Santa.
Santa Rogan gets back to the slay and finishes delivering cannabis to the entire world. The entire worlds population is high on Christmas and having a great time. News anchors giggle while delivering the news. They get back to the real Santa and apologize. Seth Rogan asks if he's still on the naughty list, Santa says, "I might need to make a new list for you," touches his nose, and dissappears. Roll credits.
The entire worlds population is high on Christmas and having a great time.
There's a shot of a pair of every single conflicting group blazed and hugging each other.
Edit: The movie opens with cousins going on The Walk to avoid their fighting family, don't realize what happens, and ends with a shot of them coming home to find everyone happy
Kind of reminds me of a DnD campaign prompt I read about once: A seer predicts a coming danger that has the potential to destroy their small kingdom. The king immediately takes action and seeks the greatest mercenaries that money can buy to protect his people. He provides his son, the high prince, with the full treasury, ever single gold piece, and sends him into the badlands to find their champions. The prince immediately blows the gold on hookers and drugs. Panicking and with the small chunk of change left, he hires a party of 5 inept misfits instead. You are those misfits. Good luck, champions.
This is such a good idea. It would be one of those movies which have a 6.5 rating but you still enjoy it because it fits the vibe and is just stupid as hell.