Board Thread:General Discussion/@comment-25246269-20140920193145/@comment-8161155-20140920230438

To the third one: we pretty much know for sure that Stan is in a secret society, and I think that Soos is, too. I don't have much else to say on it because Soos isn't very interesting to me.

I do have a Bill theory: (http://gravityfalls.wikia.com/wiki/Thread:99061) Bill is a combination is everyone in the wheel. Meaning that at some point in the future, everyone represented in the wheel will join together and become Bill. This is what Bill means by "There will come a time when everything you care about will change". But Bill has to get everyone in the wheel to shake hands with him before it can happen. So now he has Dipper and Gideon. This would explain why Bill is so unpredictable; he's got ten distinct personalities. And when Bill says that Dipper was getting too close to some "major answers", he means that Dipper was about to find out about this (so maybe the author wrote about it on the laptop, and maybe it's in the journal somewhere).