The largest contingent of Marvel superheroes assembled Monday night in Hollywood for the world premiere of “Avengers: Infinity War,” coming together to celebrate the studio’s most ambitious film to date. Chadwick Boseman, fresh off “Black Panther,” Avengers stalwarts, Robert Downey Jr., Scarlett Johansson and Mark Ruffalo, and newer Marvel entrants Tom Holland and Evangeline Lilly, […]