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Analyzing the SM6 spoiler collage

A bit late to the party with this one, but I have some ideas I haven't seen brought up by anyone else so buckle up and get ready to theorize!
Let's start with the easy stuff:
priest-Gregor
exorcism-Gregor attempts to perform an exorcism but likely gets possessed himself (see the demon priest poster at the movie theatre in Tender Treats)
church-We get a better look at the local church, seeing as the door we see in Tender Treats has a cult diamond shaped window in it, there should be some pretty interesting stuff in there, maybe even the tome from the ARGs
burglars-The thieves
cat lady- Even if you're like me and not a patron you can still tell based on blurred image previews and post titles that one of the new characters is an old woman and there's also a bunch of cats slated to appear in the episode. It's pretty easy to see the connection.
touhou plushie in the bottom left-just confirming there will be more Touhou references
Less obvious stuff that I feel really confident in:
the nine circles of Hell-Since were likely to meet a new demon this episode we may also get a glimpse at the SMverse version of Hell
women drinking-Lila goes to Jaune's house and gets drunk with her, this is also where we meet Jaune's husband in person, since he's confirmed to be in the episode
furnace-Dexter's body is cremated, likely by Patty after she's possessed by the new demon to release Moloch, who then possesses Gregor
Ones I'm less sure about:
marionette-Either something to do with the over-arcing cult plot or just a reference to the general idea of possession
angel-Possibly an angelic being who appears later in the episode, or more entertainingly, a character who acts as a rival to Susie, who is obsessed with angelic imagery
water bottles and ice bottles-My best guess is something to do with Kevin and the candy cartel
eyes-While it may be tempting to relate this to Eyes, I think the stark bright eyes against black may represent the Candy Dealer
person waking up-Someone comes to after being un-possessed and feels great and doesn't remember the possession, either that or something with some new character
blood flow-I honestly have no fucking clue on this one, maybe some kind of demonic infection or just saying there will be a lot of blood
Spooky Watch (a Spooky Month x Yo-Kai Watch au)
An idea first pondered by @crossover-enthusiast and actually "made" by me. This will involve both lore and hypothetical gameplay/structure.
The Premise
Due to (as of yet undefined) things his dad did, Skid naturally has the ability to see spirits, referred to as spooks.
He half-accidentally summons Moloch, who runs loose, in an effort to convince Pump the spirits he's seeing are real, as you could probably tell, Skid and Pump are less oblivious and somewhat more mature.
While trying to catch Moloch, the boys meet Eyes, who is the leader of all the spooks in town. Learning about what's happening, they gift Pump (as well as Roy and Kevin) a spooky watch (a visual cross between the yo-kai watch and the cult pendants) hoping to let humans and spooks better understand and befriend each other. Eyes is unaware that most spooks are going to use this "thinning of the veil" for their own ends.
After Moloch is dealt with Roy's parents and later mayor Evermore find out about the watches and form the cult in an effort to take and/or recreate the watches so they can enslave the spooks.
Spooks!
Moloch is mostly unchanged, with the exception of not having a lower body at all, as he's a molten gargoyle.
Dexter, specifically the Dexter Fella, is the one spook everyone can see, in the vane of Manjimutt from the anime, always being mistaken for a weird short man. But unlike Manjimutt, Dex intentionally scares people, just not for the reason he wants.
The actual Happy Fella and Sad Guy are also spooks, named Laughella and Gloomuy.
Ooga Booga is a spook that just wants to jumpscare people. In a hypothetical game, she would act like Babblong.
Frank is now Vanab, a van spook based on the toy van Frank from the Deadly Smiles credits. He would also act as the Spooky Watch Mirapo, except instead of teleporting you, he just picks you up and zooms you away.
The Thieves appear as the very yo-kai they were dressed as in the 2019 Halloween drawing by Pelo. Their goofy, reoccurring side villains.
Here Bob is Vealsin, a pig-devil spook who is obsessed with exotic food, an obsession he shares by inspiriting people. When the boys, Roy and Kevin all get to the abandoned Boys n' Grills where Bob declares them his dinner guests, then the eating rhythm game, and then the fight. Bob being a cultist is reflected in Vealsin willingly working with the mayor.
And lastly, SKIDAD! He appears from the mannequin after Moloch gets loose and acts as the Whisper. He looks like a sentient speech bubble.

So, um, Gregor is DEFINITELY a cultist... The implications of this, especially for episode 6, are very interesting. Expect some more SM theory stuff coming soon. (On a side note, I'm not sure, but it looks like their doing a secret Santa, which is so funny and wholesome, as weird as it feels to say that about a cult that's trying to take over the world)
So @crossover-enthusiast , @the-spooky-children what do you think?

Also, I headcanon that these are all official Happy Fella merch in-universe and Dexter got to possess a nutcracker instead of a regular doll for a change.
Analyzing the Hollow Sorrows thumbnail for last minute predictions

The first thing I want to say is I didn't look at the cast list, so I don't know if there really is a new demon, but I'm operating under the assumption there is.
The eye in the background is Moloch's, being paralyzed, he's reduced to a watching ghostly presence and a looming threat if New Demon succeeds at freeing him.
The big thing is that Skid is looking at Gregor while Pump is looking at Patty, possessed by New Demon. I think this is symbolic of the role this episode will play in the boys' arcs. Pump is drawn to the more chaotic and unpredictable supernatural events happening in town. Pump is also the one who seems to be more affected by Eyes
On the other hand, Skid is drawn to Gregor, who is heavily implied to be a cultist in this image:

So him manipulating Skid into replacing his father is a distinct possibility. All this supports my idea that the finale episode will see a clash of Skid and the cult against Pump and Eyes.
Also, the fact that Gregor is shadowed in the same way as the villains serves as yet more evidence that his intentions aren't pure.
The Tree Banshee theory
This is a theory predicting the role of Spooky Month's most enigmatic monster, one many fans might not even know about yet, so sit back and enjoy!

Watching HS for a second time, Gregor's pose here stuck out to me, so I went back to check my hunch...

Yep, he's in the same pose as the figure on the left wing of the gate. But what about the tree like figure on the right wing?
Well, for that, we turn to the movie theatre, many fans know about the demon priest poster that foreshadowed HS back in TT, well we see a very interesting poster for a second in episode 6

"The Forest Sight", huh?
Now for the clencher, we turn to an image from the arg

The same eye patterns, and a ghoulish being I've come to call the Tree Banshee, you might remember it for it's scream in TT or for an illustration of it in the book from the TT arg.
I believe this entity also somehow benefits from sacrifices made to Eyes and that it will be a/the major monster of a future episode, which lines up well with my idea of Roy's episode being about him chasing Skid and Pump into the woods, where they get lost.
Reviewing the Hollow Sorrows soundtrack
I did this back with the TADC pilot an had a great time with it, so I'm back with the latest addition to the SM score
Foolish Sinners
I really like the variety on display here, the spider's presence being underscored by frantic strings being a particular highlight. Short and sweet opening track.
The Garden's Guardian
Given that Gregor is the featured character of the episode, it's really important for his theme to be both effective and non-intrusive, as it plays several times in the episode. The actual feeling of the song is a great example of "showing the character's truth", as in, encapsulating Skid and Pump's first impressions of the father.
I'm Glad I Picked This Job
One of those fun bit tracks we get every so often in SM, and with a lovely chip-tune feel. My only complaint is that it makes me more bitter about the fact we won't get a proper sci-fi themed episode.
Sweet Enough
This one I'm a bit mixed on, we didn't really need another variant of Sweet & Sour, especially since we actually get 2 in this episode alone. It's not bad by any means, it just felt a bit unneeded.
Holy Sweet
I like how deliberately out of place this song feels, it feeds into the sense that Gregor is new and not used to the town's "local ways". Again, this also calls back to a character's truth, with Kevin's immediate dislike of Gregor.
Vessel's Parasite
I love the way this song unfolds like a summoning ritual for Moloch, it helps in setting just how much of a threat he really is. There's little else to say, just a great horror track.
The 9th Circle
So, this is the first appearance of what I've dubbed the "exorcism motif", but only later into the song, after it expands on Vessel's Parasite. This is followed by the emotional interlude, which I'm somewhat disappointed didn't feature the Happy Fella motif. The piano segment following this is the exorcism motif I alluded to earlier.
Valley of Shadows
I love this track, easily my favorite for this episode, it conveys a very unique energy that I feel it could only really be accompanied by a monster rampaging through town. I also like how it just so happened that the first SM episode to release after Undertale Yellow features what's easily the most Toby Fox-esqe track in the whole series, at least up to this point. I can't be the only one picking up the Dummy motif, right?
Ashes to Ashes
I'll just say what we're all thinking, I wish we got more of the evil Spooky Swings at the beginning, but alas, that isn't what the scene called for. Then we get the more intense version of the exorcism motif, which leads into the final confrontation. Said confrontation just amps up the drama of the melody, but in a very natural way.
Ruega Por Nosotros
I really like this simple track is composed of 2 neat segments, Gregor's motif and the exorcism motif. It helps sell the feeling of a literal hollow victory.
33:20
This really is just great eldritch ambience to be a cultist too, but that's all it needs to be. It also helps show Eyes as a genuine threat for the first time.
Disbelieve
First off, I find it interesting that the title isn't "Disbelief", but "Disbelieve", as if it's an order. Which would be fitting, as this is the first time we see the boys in genuine emotional pain and confusion. I'm very interested to see if this theme's motif will make any future appearances or quotes.
Judgement Hour
A really solid credits theme, it doesn't quite top Compliments to The Chef, but the way it starts as a Friendly Nightmares remix, before the Ooga Booga break and then goes into it's own thing is really creative and makes for a unique experience.
Now for the tracks outside the main episode.
I enjoyed this year's variation of the Newgrounds theme, and it's interesting how you can almost make out a genuine melody in title_missing3, like it's foreshadowing a theme for the Candy Dealer. Tubular Swings is nice, but nothing to really write home about.