After seeing the GF SDCC Trailer and this most recent episode it got me to wondering….

1. Alex did not answer a question about the kids’ parents at SDCC last week because of spoilers.

2. We have this image

from a letter that Mabel is writing, most likely to her parents (we know from the shorts that Mabel sends stuff home to their parents)

3. We also have this image here

So what if Mabel writes home about their new grunkle, and when their parents get this letter they are obviously upset, and come to get the kids.

What if the people Dipper is pointing the gun at are his parents, because he’s not ready to leave Gravity Falls yet?