OoooOOOOOH I REALLY LIKE THAT
It would be so great if they avoid the whole “oh no were about to lose everything jUST KIDDING WERE SAVED THANK U MAGICAL HAPPENINGS”
Unless in desperation Dipper (? Most likely, maybe possibly Stan(he’d want to save the shack because a) home b) huge investment c) whATEVER IS IN THE BASEMENT)) calls upon the supernatural to save the shack? Like perhaps even summon Bill again, they’re that desperate. They might think he’ll be mad at Gideon and Bill would help them to get back at Gideon, but what he wants in return actually ends up being so terrible that when they finish with Gideon the next, final episode is escaping Bill again?!?!?!?
AaaaaAAAH SO MUCH SPECULATION