Here we areat the middle of May, with the unofficial start to summer still about a week and a half away, and it’s time to say hi to the new season. Already, the Marvel Universe has disgorged its massive conclusion to last summer’s “Avengers: Infinity War.” Back then, “Infinity War” was a shade over 2½ hours. This new flick, “Avengers: Endgame” has a run time of three hours and two minutes. You heard me right – a half hour longer than “Infinity War.”