If you’re like most movie fans, you likely spent part of this past weekend at the multiplex catching up with "Avengers: Infinity War," Marvel’s latest — and greatest, at least in terms of roster size — entry in its ongoing cinematic universe. Bringing together 40-plus characters from 17 prior sagas spanning the past decade, the studio’s epic extravaganza has long been the box-office film to beat this summer. And judging by its first weekend, Joe and Anthony Russo’s all-star effort should have no trouble living up to those expectations, after a record-setting opening three days that even earned Marvel’s superteam kudos from Ryan Reynolds’s wisecracking (and apparent Avengers reject) Deadpool.