I'm hoping the movie plays through like multiple matches. We'd get to see multiple Killers displayed to showcase the different levels of horror and brutality the Realms showcase, numerous combinations of Survivors interacting... The Observer and THAT side of lore would be good, imo, whether dedicated to a prequel(s) or sequences throughout the film (preferably the latter. Storytelling, perhaps?)

 Imagine a lick of Dredge. Haddie finishes a (?glowing?) totem, "Overzealous" thanks to her "Leader" Dwight's rushing/affirmation. They go into another room when Haddie receives a vision. A locker sounds downstair, and Haddie's "Lavalier Microphone" {😉} begins to make sounds, scaring Dwight, who is scorned by Fen (who has a Toolbox) on her nearly done Gen ("Technician", as her repairs will be done quietly. She could fail a "Skill Check" due to the two scaring her, with no explosion coming out) and "Prove Thyself", into heading towards a subtly shaking Locker. Haddie helps Feng when suddenly The Dredge bursts out and grabs Dwight! Haddie flashes the abomination, causing it to drop Dwight. Feng finishes the Gen and throws a Toolbox {lol imagine?} at it. Haddie jumps out a window (or, due to pure terror, Dwight hurls himself out, instead), the other dashes out the front, and Feng escape into the kitchen. Multiple lockers slam (disoriented by Haddie, a reference to "Residual Manifest" having after-effects w/ Flashlights, nullifying"Darkness Revealed"'s aura-reading), who misses a hit on a window-vaulting Feng saying "U mad?" before dashing away (Lithe-references.) And with that, Nightfall comes down, the screams getting louder even as she runs, as if informing Feng of its previous victims and the everlooming fact that she cannot escape.
      Nightfall eventually drops, with the fourth Survivor on hook. Cue a heal, "Septic Touch" Blinding and Exhausting (maybe just a reference to them being tired, indicated by huffing and puffing, as well as foggy/lowered vision, as if succumbing to The Dredge's influence) Feng and Dwight. The two argue, until Dwight convinces Feng to heal him. Dwight sees Dredge, though, and jumps, causing them to bump into each other. Dwight drops glasses. Feng scrambles to her feet and vaults a pallet, tripping, as it suddenly turns to dust. The Dredge `disappears`, however, teleporting to its Remnant and sneaking up behind for the hit, followed by the Mori. The other Survivor recovers from their Blindness, just in time to see their partner getting swallowed  by the darkness, their screams (Feng's would be best, since she'd try to vault away Again but failed due to "Dissolution"and "Septic") getting mixed into the other terrible groans of past victims. (Dwight would be the best witness in this situation, as he'd be like "I almost got swallowed into that thing! I gotta get outta here!" and "Bond" back with Haddie and a freshly unhooked 4th. Haddie would know of what happens to Feng due to "Inner Focus." Maybe stumbles upon Dwight after finding his "Scratch Marks" where the final 3 do a Gen together and try to rekindle whatever Hope {😉😉} they have left to make it out of this. Fourth (4th) one, based thematically, could be Jonah, Mikaela, Zarina, Kate. 

 Then a /bite!/ of The Oni, bleeding a Jake—who immediately goes off into hiding—and hunting a David. David gets sliced, but "Deadhard"s the second attack and palet-stuns the Killer. David [shredding off his clothes??] is now under "Nemesis". He gets fAr away enough that he can catch a breath and maybe calm down [or upset that his clothes are tattered and destroyed??], Oblivious {😉} to the fear (Heartbeat) he should have towards The Oni's ability.
        Muscle-man finds a bleeding Dwight working on a Gen. Dwight takes on a "Leader" role, continuing to Repair while telling David to open a chest. The latter quickly uses his newfound medkit to heal the Office-temp, as he himself "Doesn't need it." (`No Mither`-reference.)
        A roar erupts, frightening Dwight into a locker, now refusing to "Prove Thyself", causing David to punch the locker and scare a nearby Crow (a "Spies from the Shadows"-reference.) Oni finds a blood-trail up the Sanctum of Wrath before charging and wrecking David. He then opens the locker and finds Dwight, grabbing and taking him towards a hook. Yui picks up a nearby pallet ("Any Means Necessary") just as she sees the two. Jake sabotages one hook ("Saboteur"), and Yui "Breakout"s to the second hook.She destroys it but gets cut. Dwight escapes his grasp and runs off after Jake. The Oni now has his sights on Yui, who wraps her wound with her"Lucky Break" band, in order to hide the blood {and scratch-marks 😉😉😉}. The Oni knows the battlefield, however, and won't let her get away successfully ("Zanshin Tactics"). First, he goes back and gets David, hooking him and activating "Blood Echo". Cue camera showing everyone alive in agony. I'd like it if a Gate gets powered, but someone gets charged and downed. Oni charges again and swings but is blocked off by the Entity: no matter how many times he cracks his weapon against the blockage, it doesn't break. Instead, he goes back and Moris whoever is downed, everyone else watching.