The Wormhole wrote:
That is really the only logical direction they could go, IMO.
Not necessarily. As I've said before, it's not impossible for someone to survive the kind of impalement injury Coulson received in the film, if they get medical treatment quickly enough. And we never actually saw the medics call his death -- we just heard Fury tell the others that they'd called it, and we know he wasn't above lying to manipulate their emotions.
True, an injury that serious would take months to recover from and would probably leave a person permanently impaired in some ways, but maybe Coulson could have been healed by some kind of bionic grafts or a variant of the supersoldier formula. So there are other possible ways they could go besides revealing that the "dead" Coulson was an LMD.