That was a rather swift end to the Demon Realm segment. Zeldris got an apparent death scene, but like I've said before I doubt he's actually dead. Nakaba has a bad habit of faking the readers out with this stuff as well as occasionally outright bringing characters back from the dead, think Wild surviving his kamikaze attack and Helbram's soul somehow ending up in a helmet. The fact that Schwarz was reaching out to Zeldris looks quite suspicious so that could be the key, though I could also see the pair being saved by something related to Behemoth. The beast was home to a very large quantity of life spirits, enough to affect the entire realm, so their simultaneous release could have some unusual effects.
I was hoping Behemoth would be killed during this invasion because its mysterious origins and great power gave me the impression that its demise could trigger something big to happen later. If Chaos created it for some special purpose similar to the Lady of the Lake's role as a magic reservoir then that purpose is now no longer being fulfilled. On top of that there's the question of whether so many life spirits returning to the spirit realm might prompt a reaction from their Great One and I've also long suspected that the gate to Camelot randomly appearing on Behemoth's back sometime before the start of the story was not an accident but rather a deliberate provocation orchestrated by a third party. Will be interesting to see where this goes.
Moving on, I would have preferred for the good guys to learn of the situation in the Demon Realm through Percival's life spirit information network, but I guess it was necessary for Zeldris to have this exchange with Meliodas in order to explain how the Abyss works. Breaking the seal on the prison requires power on par with the Demon King, which leaves us with two options. The first one is that Meliodas regains his former power along with his unrevealed original magic and becomes the new ruler of the clan, and the second one is that Zeldris is still alive and will be the one to rescue his people in the end, proving that his own doubts about not being worthy of being king were unfounded. Well, I suppose there is also a third option where the task of freeing the demons falls onto Tristan's shoulders so that he can earn the approval of the entire clan, but he's definitely not going to become the next Demon King so I don't really like this scenario. Then again I don't see Meliodas ruling the Demon Realm either so I suppose that only leaves one option.
The last thing to address is the elephant in the room, that being Elizabeth's return. I will say right off the bat that if this is exactly as it seems with no strings attached then it's total bullshit. When Elizabeth activated Perfect Time it prompted Meliodas to start bawling his eyes out because it essentially meant her going away somewhere he couldn't follow. This was reinforced after the battle when she ended up in a coma that Gowther said she was unlikely to ever wake up from. Now that was obviously not actually going to stick because in a series like this a character being put in a state of half-death practically guarantees that they will be revived, which is completely fine as long as the amount of effort required to bring them back feels appropriate for the situation. The problem here is that Elizabeth's revival required precisely zero effort because she just randomly got up mere days of her sacrifice for no reason. This is nonsensical.
However, the reason why I said no strings attached is because the manner in which things happen is somewhat suspicious. In the very first shot we see of Elizabeth's face she has this weird grin on her face, which does not seem appropriate for the situation. This gives me the impression that something may have gone wrong here. Is it possible that the person who woke up is not actually the Elizabeth we know but rather a different personality, paralleling what happened in NnT when Meliodas died and then came back without some of his emotions? I guess that could be way for Nakaba to finally show us the so called "Bloodstained Ellie" by turning Elizabeth evil.
Alternatively it could be that the revival that the next chapter title alludes to is not the revival of Elizabeth or even that of the Archangels like someone mentioned, but rather that of the SD herself. I don't know what the exact mechanism behind it would be, but with how obsessed the DK was with possessing his children's bodies it wouldn't be out of the question for the SD to attempt something similar. The fact that this occurred as a result of Elizabeth mimicking her mother's power and that she just so happened to wake up immediately after the Demon Realm was destroyed could be relevant as well. Most importantly, Elizabeth coming back in a way that introduces an even bigger problem than her coma would alleviate the issue of said coma being essentially ignored as a plot point, because in that case the real quest to bring her back has not even begun yet.
