Curate, connect, and discover
THEORY.
I think, in some weird way, that the merchandise and audio give extreme foreshadowing to what's going to happen to certain characters as the story dives, mainly through the art and choice of words.
1. The constant mentioning of Barnaby losing his head is greatly worrying. This is something almost a lot of people know of.
2. Julie is connected to her theater character Sally assigned her with, specifically with the quote of "a harrowing journey of self-discovery and vengeance." This is connected with an old photo that Clown drew of the disturbing woman behind Julie in one of the non-canon art.
3. Remderem being an anagram for Remember, with the d swapping b. This might connect to the hidden 'd' section on an advertisement, alongside the slinky toy being the only toy in the recent update labeled "d" who coincidentally has a "b" in his name.
4. The recipe book cover on Halloween update. This one I'll explain entirely alone.
The picture with Wally being in front symbolizes how he's going to play an important role in the story. Behind him, on a stool, is Sally, Barnaby, and Eddie. Sally was the person who mentioned a monster hidden near the neighborhood, and Eddie who witnessed a weird trip later on in the Christmas update, (not to mention, his face is mainly focused on during Wally eating an apple)
Julie and Howdy are not with anyone and go their separate ways, facing a more individual role for their part. This connects with my Julie theory, and Howdy could be an exception since he knows the stuff he sells isn't really edible.
Poppy and Frank are not in there at all, presumably either no space or they're hiding. Perhaps this is intentional.
Barnaby is in the top center, right above Wally. We don't know much of him knowing or witnessing anything, but I feel there's going to be an importance to him. This could connect with another person's theory about the word "smooth" from the commercials (and in the crispy sweets pancakes recipe) being important in some way or, in my opinion, could foreshadow him, perhaps dying or being the catalyst of whatever insanity to start. He hovers like an angel, with only his head there.
(P.S. in Night Mind's older video, it's mentioned only Barnaby's GIF is clickable.)