i read a rus fanfic once where for some chapters these two shared a body, not as in “Sock Opera”, they both have the same amount of control over the body. So i was thinking of an AU where bill somehow gets stuck in dipper’s body, idk maybe dipper touches bill’s statue several years after the wierdmageddon or (insert your own idea cus i have none). Now they have to figure out how to get rid of each other (i guess for the sake of this au there should be a reason bill can’t just kill dipper, let’s say he’s weak or maybe axolotl did give bill a second chance so he has to play nice), also bill may not be as helpful as expected because no way he will let pines family decide which way they will dispose of him. Basically i just like to think of all the situations and interactions there can be with such set up