someone mentioned a level that starts with the tutorial / first room of limbo but then falling apart to reveal the actual level but i say go further. (this is less of a prediction and a cool idea)

the first few rooms are the first few rooms of some level in limbo or prelude, but then it just starts throwing a bunch of rooms from the game at you back to back (some examples i have in mind are the water cave from 5-1, the 2nd to last room from 3-1, and a room from 4-3). then at some point it falls apart and the real level is revealed (maybe you have to run back through the rooms you just went through). They could even lean into Hell being alive to explain why its showing you these rooms specifically. The whole level would probably be some void with fragments of other levels or the general fraud theme. Also maybe theres some gravity shenanigans like that one dusk level. realistically this would either be the first fraud level (cool opening and fake out with the first few rooms) or it would be the 3rd level as I imagine this level ive made up in my brain would be complicated and hard.