Tony Stark saved him: Of all The Avengers, Stark was easily the closest to Coulson at the time of his death, and the most visibly emotional when he heard the news that Coulson died. So, it would stand to reason that if Stark could have done anything to save his friend, he would have, right? Some fans think he did, but according to Coulson, The Avengers don't know about his revival, so if the theory did turn out to be true, Stark would've had to save Coulson through some kind of indirect manipulation by S.H.I.E.L.D. Unless, of course, Stark once again found his way into the S.H.I.E.L.D. computers without anyone knowing about it. He's a rather crafty fellow, after all.