User blog comment:Dereviewer/Pacifica's Change/@comment-11643042-20150723164119

A little off topic, but this theory connects Northwest Mansion Mystery with A Tale of Two Stans.

NMM has two main morals. The first is that you are not bound by your family history. This comes into play when Mabel gets worried that she and Dipper will turn out like Stan and Ford. Maybe that will initially happen, but at some point they will stop, look at each other, and say "We got stupid." Then they will hug it out and their relationship will become stronger than ever.

Stan and Ford will see this and become confused. How could Dipper and Mabel, after drifting so far apart, come back together like that? This will teach them the second moral of NMM, that it's never too late to change your ways. So in summary, Dipper and Mabel will not turn into Stan and Ford, Stan and Ford will turn into Dipper and Mabel.