It’s rather astonishing to look at Marvel Studios’ rapid cinematic rise over the last seven years, winning not just the hearts and minds of longtime die-hards, but of men, women and children the world over. Pair that astonishment with the incredible trajectory set by recent “Phase Two” entries like the Russos’ edge-of-your-seat political thriller Captain America: The Winter Soldier and James Gunn’s just plain satisfying sci-fi adventure Guardians of the Galaxy, and you’ve got every reason to be very, very excited about Joss Whedon’s superhero re-assembly, Avengers: Age of Ultron.