MiY exposure (theory ofc)
This theory is built on 1 theory.
Theory 1: When Julie picks up items from their original timeline, she travels back to a time where a significant event happened with those clothes. F.ex the torch she picked up, and she storywalked to the dungeon (where it originated from) and threw the rope to Boyd. The clothes she wore when she SW to the previous cycle was presumably originating from the OG townsfolk.
Keep this in mind please, I am going schizophrenic here.
Later in the seasons someone will surely spread some unfortunate intel (the MiY coat/thingy) and that the "big boss" is amongst us. This will ofc spread some fear, and everyone will be accusing eachother. Julie has FINALLY figured out SW, and how bookmarks works. So she tells Boyd to collect 1 peace of every residents OG clothing they brought into town. She gathers a wheelbarrow worth of clothes, and starts storywalking again and again. Until she reaches Sophie's clothing. She'll see Sophie along with young Victor, people she doesn't recognise. She'll puzzle it together that Sophie is the MiY, and by that point it will be too late. There'll be a massive slaughter (with a lot of the main cast surviving), basically just killing off the extras for some drama. And the challenge in season 5 is how to escape, with a lot of people who don't know how this town works. Lots of chaos. Lots of drama.
Alternatively: She just storywalks with the MiY jacket, and that is it. But we know they love to create drama.
This has NOT been proofread, or anything I just want to get it out there. So that other lightly schizophrenic people can implement my heavy schizophrenic theory in theirs.