"Iron Man 3" remains No. 1 film in North America

Despite a strong showing from another literary legend, "Iron Man 3" remained the No. 1 movie in North America for the second week in a row, with an estimated box office haul of $72.5 million. To date, the film has brought in an estimated $284.9 million at the domestic box office, according to the Hollywood Reporter.

Overseas, the film brought in $89.3 million, pushing its international total to $664.1 million. Worldwide, the film is just shy of joining the $1 billion club, bringing in $950 million to date.

Even as "Iron Man 3" continues to add to its haul, the question is still out there as to whether this will be the final Iron Man film - or at least star Robert Downey Jr.'s last Iron Man film. With the release of Iron Man 3, the actor has fulfilled the multi-picture deal he signed with Marvel in 2007.

As previously reported, Downey isn't locked in to Joss Whedon's "Avengers 2" yet. Although negotiations have begun for the sequel to the $1.5 billion blockbuster, and "Avengers 3" beyond that, "Iron Man 4" hasn't been part of the discussions. In a Comic Book Resources poll earlier this week, 66.3 percent of respondents said that Downey isn't replaceable as Tony Stark; if the actor decides not to continue in the role, Disney/Marvel will have a hard time filling those shoes.

"The Great Gatsby," meanwhile, came in second behind "Iron Man 3," with a strong $51.1 million at the North American box office. Both films will face additional competition next week from Paramount's heavily promoted "Star Trek: Into Darkness," which opened in seven international markets this weekend and made $31.7 million.

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