Box office observers agree that Iron Man 3 is playing more like a sequel to last summer's The Avengers -- which featured a myriad of Marvel superheroes, including Downey's Iron Man -- than a follow-up to Iron Man 2, which posted a foreign opening of roughly $100 million in 2010.Iron Man 3 broke a slew of records, scoring the biggest weekend ever in Argentina, Hong Kong, Indonesia, Vietnam, Taiwan, Philippines, Malaysia and Singapore. It also scored the top Marvel opening in another raft of markets.
