Unsurprisingly, the U.S. box office wrapped its weekend with Marvel Studios' "Avengers: Age of Ultron" triumphant with $187.7 million in the bank. The performance put Joss Whedon's film at #2 for all time domestic openings...only behind his original outing with Earth's Mightiest Heroes.

As The Hollywood Reporter notes, the numbers combine with "Age of Ultron's" already impressive global openings to earn $627 million to date. That already puts the movie's overall earnings past the total box office for a number of Marvel hits including "Guardians of the Galaxy," "Captain America: The First Avenger" and "Iron Man."

While the opening night numbers for the film beat the original Avengers flick's returns and things continued to look strong into Saturday night, industry analysts suspect that a big audience for the heavyweight championship fight between Floyd Mayweather and Manny Pacquiao put a dent in "Age of Ultron's" overall performance. Without that obstacle, it's very possible the sequel could have reached "Avengers" opening number of $207.4 million.

From here, it's a waiting game to see if the new superhero blockbuster will have as long a tail as its predecessor. The original earned $1.5 billion over its life in global theaters, and so far "Age of Ultron" has made some box office records in overseas markets while it has yet to open in some other countries.

Stay tuned to CBR News for more on the Marvel Cinematic Universe.