So shinazugawa upper body was squashed under rubble, between iguro's face and tomioka's arm I hope scar man is ok
Not sure if someone already point it out or not, but in chapter 146 when zenitsu is talking with is gramps, the flowers that's tangling with his feet has the same design as teh blue spider lily in ch 127. So maybe that blue spider lily is something that only grews in afterlife (whi the hell is the doctor to get them thought...), hence make him imortal or something.
Well I didn't check the colored chapter (although mind you they are inconsistent) but these were most likely good old normal red spider lily, it's broad topic but they are just associated with death.
remember, muzan said the medicine is just in the experimental phase. my theory is that, the reason why muzan cant find the spiderlily is because it is in another country. what if there is another muzan in the far away lands? example, since its in the heian period at that time what if the bluespiderlily is the emperor's long awaited elixir of immortality? yes, only muzan's demon group will disappear. proof? there's yushiro. and yushiro didnt even vanish when tamayo died. so its possible to create demons that can sustain on their own. thus, demonslayers will always have something to do as long as the bluespiderlily is around
It's worth a thought, about yushiro he's a demon made by tamayo who is made by muzan, but unlike nezuko still survives my drinking blood which makes him consumer of humans, his fate is still vague, maybe you're right and he's completely unrelated to muzan, or there is still a link and he'll die with muzan death. Or leaving the question open tell the end, he might just watch the sunrise after everything and choose to die, or drink human returning drug....hm his fate is interesting
I don't have anything to add on blue spider lilies, it's too vague a concept, is it an ingredient? just the drug name? marketing? Idk. muzan said there is no need for it now that nezuko overcame the sun the only way it's related is on how did nezuko overcome the sun or why was she different in the first place
I personally don't think she'll introduce new characters and completely new storyline, too many reasons.