I've been rattling my brain every now and then to try and come up with some predictions for the encores (because i have nothing left to p-rank) (please god jakiter i need UKMD already) and these three I have the most solid ideas for. I'm assuming every encore will follow the trend of the first half being the inverse of the original layer's theme and the second half being an extremification of it, like 0-E and 1-E.    
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**2-E LUST**    
The level starts off in the city now shrowded in thick fog, a greenish haze now hangs over the city instead of purple. There is no wind either. The city is derelict, practically in ruins and dirty water partly floods many parts of the level (would integrate rooms from 2-3 more nicely). Everything feels stagnant, with any machinery being turned off as well.    
The second half has the winds pick back up much stronger than they were before and the level regains its purple hue. Along with the hurricane level wind, heavy rain and lightning are also present (storms can actually turn the sky purple in real life, second image is an example, i think this ties into the circle of lust quite nicely with it being windy and purple). The machinery, mainly the turbines, would also reactivate in this half of the level.    
If jakiter is feeling particularly evil giving this half of the level a wind mechanic when outdoors (kinda like the heat shield mechanic in 0-E) would be fitting.    
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**5-E WRATH**    
The level opens to Ocean Styx completely drained of water, now taking place on the dry, rocky sea floor. The bodies of the sullen, various debris and shipwrecks dot the landscape, made more visible by it now being day (probably overcast as to not be too bright). Destroyed versions of rooms from 5-3 would fit pretty well here, shipwrecks and all.    
In the second half, the ocean re-floods. The sea floor is now pitch black, any light present coming from lanterns present throughout arenas. This would overall be pretty similar to the opening of 5-4. Since 0-E and 1-E have you going through previous arenas after the second level theme is present, here you would go backwards through the previous rooms with them all being flooded (basically what happened in 5-3 as well).    
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**8-E FRAUD**    
The first half of the level is conspicuously normal. Rooms from previous levels are now inside larger soundstages, lacking proper ceilings, instead having lighting overhead. Doors or other places that used to loop back into the rooms now lead outside into the larger studios. Various recording equipment (cameras, director chairs, etc) is scattered in and around rooms. Any moving/rotating segments or swapping themes are gone, and outdoor segments (second half of 8-1, couple parts of 8-2, space segment) are in large greenscreen rooms, rather than truly outdoors. TVs are occasionally present around the level too, but all are turned off. See the last two image if you don't know what i mean.    
The second half, perhaps having us turn on and enter a TV, has the illusion return. Recording equipment vanishes, rooms loop back on eachother, parts of rooms move around, or swap themes (all probably in different ways than original) and outdoor segments are truly outside again. The various fraud fuckery is cranked up to eleven, with more moving segments and swapping themes, even both at once. Segments based on other layers are also now themed after other encores instead of regular levels. The whole level being space-y (at least outdoors) would be pretty cool too i think.  
I also have an actual name for this one: **FRAUD /// ENCORE: THE SHOW MUST GO ON** (i think it fits the fraud encore, and encores in general tbh, pretty well)    
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PS the act finale encores (3 6 and 9) will probably all start blue and turn red halfway through and maybe each have us fight one of the archangels idk, please give us P-E jakiter i NEED the pain

Encore ideas for Lust, Wrath and Fraud (text in body, images related)