sure he is for the time being he already has shone enough he got cure for chopper, blocked Hakai , wounded Kaido a wound that will not disappear and defeated King.
he is on verge of death right night and needs medical help. it is obvious that he needs saving right now, it will be weird if he stand again in 4 or 5 chapters and Kill Kaido, that is simply not happening for many reasons, first he would not get a new magic pill , secondly Oda will not anyone outshine Luffy even if his name is Zoro.