In the four-part show, archival footage and personal videos and photos are intertwined with present-day interviews and scenes of the group embarking on their 2022 tour
By Sunday, the movie is expected to come close to or even break the weekend record set in 2015 by "Star Wars: The Force Awakens," according to box office analysts. "Force Awakens" grossed $248 million over its initial weekend.
"Infinity War" features more than 20 superheroes from Marvel's ever-expanding cinematic universe, including Iron Man, Spider-Man, Black Panther and the Guardians of the Galaxy.
Critics largely praised the movie for its ambition, scale and wit and for a jaw-dropping ending that seems designed to get audiences hooked for another instalment next year.
"Infinity War" opened Wednesday in some overseas markets, where it has sold $95 million worth of tickets in its first two days, Disney said.