The Finale Wasn't About the Ritual. It Was About the Cycle.
I genuinely think the biggest reason everything went wrong is that the ritual was incomplete. There was clearly one missing piece that caused the entire plan to backfire. Henry was seconds away from killing Victor, Fatima is slowly losing herself, the Talismans are gone, and the town has reached its lowest point. This doesn't feel like just the end of a season. It feels like the end of an entire cycle.
Town has been repeating the same cycle for centuries. The years Tabitha saw in the lighthouse weren't random. I think they represent the beginning and end of each cycle. The people change every time, but their roles remain the same. The Man in Yellow wins, the cycle resets, and everything starts over again. The Boy in White keeps trying to stop it, but he's failed every single time so far. His line about "this time you're going to lose" makes me think this cycle is finally different.
The bone ritual failing is probably the biggest mystery, but I think there are only two possibilities. Either one of the children's bones is still missing, since Tabitha only ever saw seven children while everything else points toward there originally being eight sacrifices, or the ritual simply wasn't finished. Jade and Tabitha recovered the bones, but they don't actually know what to do next. I think the Lake of Tears is the final destination, and until the bones are taken there, nothing is truly complete.
Speaking of the Lake of Tears, I think it's going to be the most important location in Season 5. Jim telling Ethan to find it wasn't just a random line. Whether it brings back the sacrificed children, completes the ritual, or reveals what really happened centuries ago, I don't think the story can move forward without it.
I've also believed for a long time that spiders are connected to all of this. We've seen the spider forest, Victor has drawn spiders multiple times, and Jade's visions keep bringing them back. My guess is that the Lake of Tears is guarded by whatever those spiders actually represent.
Another thing that stood out to me was how the town seems to maintain a balance between good and evil. Day suddenly became night just so the monsters could attack Jade and Tabitha, but then an earthquake happened at the perfect moment and created another escape route. We've seen this pattern before with Boyd finding the Talismans right before dying and Donna surviving against all odds. Whenever everything becomes too hopeless, the town creates an opportunity. Whenever things start looking good, something even worse happens.
The Boy in White and the Man in Yellow remind me a lot of the dynamic from Lost. Since both shows share writers, I wouldn't be surprised if they're following a similar idea where one force wants to protect the place while the other wants to control or destroy it. It feels much bigger than simply being two mysterious characters.
I also think Julie is the woman standing in the corner of that Polaroid. If that's actually her, then Story Walking has probably taken her back to the 1960s. That could completely change everything we know about the timeline and finally explain how the different cycles connect to each other.
When Fatima says "Remember who I was," it sounds less like a warning and more like someone who's slowly disappearing. I honestly think she's becoming one of the monsters, and I wouldn't even rule out her eventually becoming the Kimono Woman since she's always been different from every other creature we've seen.
Henry is also becoming much easier to manipulate. Victor managed to calm him down this time, but I don't think that's going to last. Those visions are only going to get stronger, and I wouldn't be surprised if Henry becomes one of the biggest problems next season.
My last big theory is that Eloise is still alive. We never saw her body, and shows almost never leave something like that unresolved without a reason. I think she's survived somewhere all this time and Season 5 is finally going to reveal where she's been.
The finale basically reset everything. The Talismans are gone, important characters are dead, Fatima is changing, and everyone is back to surviving the same way they did before Boyd ever found the Talismans. It almost feels like Sophia planned this from the beginning. Young Jade's warning makes much more sense now because every cycle seems to end the same way. The town eventually turns against Jade and Tabitha, they fail, and the cycle starts again. The only question now is whether this really is the first cycle where something changes, or if the Man in Yellow has already seen all of this happen before.