LOS ANGELES (Variety.com) - Avengers assembled in full force at the box office this weekend. “Avengers: Infinity War” took North America by storm, opening with $250 million in 4,474 theaters. While numbers could fluctuate before an official tally comes in on Monday, that would surpass “Star Wars: The Force Awakens” for the biggest domestic opening weekend of all time. “The Force Awakens” bowed with $248 million in 2015.