Will John Hurt's guest spot rewrite Doctor Who history as we know it?

That's what a crazy rumor claims, at any rate. Clark Gregg hints at how Agent Coulson's story in Agents of S.H.I.E.L.D. connects with his "death" in The Avengers. David S. Goyer explains why Superman's story isn't just about a superhero, it's about an alien. What do Guardians of the Galaxy casting calls reveal?… » 4/22/13 6:00am 4/22/13 6:00am