What began as the dream of a Marvel executive who kept watching The Avengers and thinking up all the TV show possibilities set in that same universe has almost become a reality. The Defenders, Netflix's Avengers-esque mini-series teaming up Daredevil, Jessica Jones, Luke Cage and Iron Fist, is almost here. Marvel continues to release photos from the set, and fan theories abound as to who exactly Sigourney Weaver might be ...