What Even Is This?

Okay, but

Has anyone ever done an OFF/Gravity Falls crossover?
Like, the Batter realizes the Puppeteer isn't too keen on returning the world to the nothingness, so he goes to find a new puppeteer, in the form of Bill Cipher, who insists they also take out Gravity Falls.

And then the Pines crew have to travel through the Zones, either to find some weakness of the Batter's or something, or maybe get the help of Hugo, and all the while, they're recruiting the help of Tall Mister, Bird, Big Mister and others while battling spectres.

I mean. Just imagine.

Mabel trying to cheer up Elsens.

Dipper needing to know EVERY SECRET and open EVERY DOOR and read EVERY BOOK.

Stanley and Zacharie swindling every side character out of their money.

Stanford and the Judge talking in big words no one else understands.

Dipper being especially disgusted by the meat fountains, but Mabel being strangely okay with it.

Stanley and Dedan arm-wrestling.

Stanford and Japhet being all knowledgeable and talking about sciencey things.

Mabel and Enoch making cakes.

And Dipper and Valerie just being overall pessimists