Theory about Thanos' blood *Spoilers*
Anyone think the reason why Thor, Tony and Steve survived the holocaust is because they came into contact with Thanos' blood?
Tony and Thor pierced him. And Steve came into contact with him after being pierced. As for everyone else who survived maybe that's just the luck of the draw. Maybe the blood is also the key to reversing what happened but will also require their deaths in addition to Thanos' to achieve it.
I dunno, I'm just spiff balling here.