And why are you so sure about that?We don't know what happened after Thane's blast.
You could see Thor resisting to Thanos blast and then it throwing Thor away for a few meters and Thor was still conscious. Why would he be KO'ed after that? Why are you so sure Thor was KO'ed if the only one we saw awaking after the battle was Cap? Cap is the weaker and less powerful member of the Avengers, so just beacuse he was KO'ed doesn't mean the rest of the Avengers were unconscious too.
Those are only speculations.The fact that when Cap woke up all of the others were standing strong doesn't mean they weren't unconscious.Why would they stand conscious and after a few hours go and wake Steve up.Also if Hickman didn't show the actions of any other Avenger than you can only think of all of the Avengers being unconscious.
There isn't only one part of the story that I like more than the others.There are scenes like Pa Kent's death,Superman saving that kid from a suicide,Lex's epiphany and the death of Supes in the end and also many more.