For someone who will never master the intricacies of the “Marvel universe” of cross-pollinated properties and storylines, an almost immediate satisfaction in the fine craft of directors Anthony Russo and Joe Russo (“Community,” “You, Me And Dupree”) came from how closely allied this superhero adventure is to 1970s American movies, down to the superb casting of Robert Redford, the face of 1970s paranoia classics like “Three Days Of The Condor,” “The Candidate” and “All The President’s Men,” as the enforcer of 2010s universal spying on the world’s citizenry.