So the new episode, "The Last Mabelcorn", is coming out and you have probably seen both the trailers and it looks pretty exciting.
It looks like Bill Cipher is coming back, but I don't think he is in this episode and I'll tell you why. The episode looks like it wouldint have room for Bill to come back because it's all pretty full with the Unicorn stuff. the only way he could come back is if he did it in a dramatic scene at the end, But... That wouldint really work either because the next episode "Roadside Attraction" has the decription "Grunkle Stan takes the kids with him on a road-trip to sabotage all the other tourist traps in Oregon." and so tht wouldint really work with Bill back and all.
So you may think What were all those scenes in the trailer then? Well here's my explanation, I think those are Just all a bunch of flashback scenes that Ford was telling To Dipper about Bill in the secret room because in the description it says Dipper learns a new twist about Bill.
Well I'm excited about the next episode and seeing the flashbacks, and also the whole plot with the unicorns.
(Also the last episode was one of their best episodes yet.)