I have a theory based on the secret page of the new Time Pirates book, the one with the axolotl that Bill invokes in the finale for the show – who gives Dipper and Mabel some very interesting information about our favorite floating triangle and the terms of his resurrection (included under the read more.)
Basically: I have a cool idea about how Bill is going to come back. Or should I say, came back?
((I would love to hear what y’all think. Also, a big thanks to everyone I rambled to about this spoiler [most of whom I ended up tagging below ayy] as well as @fordtato for walking me through general spoiler theory post etiquette!))