Mind-blowing theory:
https://www.tumblr.com/thepersonperson/762115329999650816/why-the-hell-is-jjk-270-called-dreams-end
In short, everything since chap 266 would be a dream, or more precisely Yuji's dream.
Sounds dumb? Not at all actually (I suggest you to read it in details).
The theory above shows all the inconsistencies there are since this chapter, but bro explains it pretty well, those are not actual inconsistencies, but the usual inconsistencies we all have while dreaming.
Among all the points bro pointed out, one really is interesting: the way Yuji's DE collapsed. It doesn't look like a vanishing DE, but a DE being destroyed from the in/outside.
Next chapter could be either Sukuna or Yuji having won, but everybody else actually died.
Read it.
