"Avengers: Age of Ultron" debuted to a huge $187.6 million at theaters opening weekend, giving it the second largest weekend ever at the box office. AVENGERS: AGE OF ULTRON claimed the second largest domestic opening weekend of all-time with an estimated $187.66M. #Avengers #AgeOfUltron — BoxOffice (@BoxOffice) May 3, 2015 Still, that's far lower than analyst expectations, which projected the film to open at anywhere from $210 million - $230 million.