Iron Man 2'Iron Man 2' didn't break any records, but its estimated $133.6 million debut gave it an easy box office victory for the first weekend of the summer season, setting a benchmark for 2010 so far and a goal for the rest of this summer's blockbusters to try and match.

Going into the weekend, there had been much speculation as to whether 'Iron Man 2,' opening on a record 4,380 screens, could beat the opening weekend record of $158.2 million set by 'The Dark Knight' in 2008. As we predicted, it did not (it's fifth on the all-time biggest opening weekends list), but it did score the biggest opening weekend of the year to date, and it did so without the benefit of a 3-D surcharge (though it did grab an IMAX surcharge on 182 screens). It certainly outdistanced the $102.1 million earned by the first 'Iron Man' on this same weekend two summers ago. Iron Man 2'Iron Man 2' didn't break any records, but its estimated $133.6 million debut gave it an easy box office victory for the first weekend of the summer season, setting a benchmark for 2010 so far and a goal for the rest of this summer's blockbusters to try and match.

Going into the weekend, there had been much speculation as to whether 'Iron Man 2,' opening on a record 4,380 screens, could beat the opening weekend record of $158.2 million set by 'The Dark Knight' in 2008. As we predicted, it did not (it's fifth on the all-time biggest opening weekends list), but it did score the biggest opening weekend of the year to date, and it did so without the benefit of a 3-D surcharge (though it did grab an IMAX surcharge on 182 screens). It certainly outdistanced the $102.1 million earned by the first 'Iron Man' on this same weekend two summers ago.

Word of mouth among ticketbuyers has been stronger than the mixed reviews the film has received from critics, so 'Iron Man 2' is likely to have sturdy legs that will carry it through the weeks ahead. Since the movie has already been playing overseas for a week, it's grossed a total of $327.6 million worldwide, a little more than the $320 million or so that Marvel spent to make and market it.

As expected, last weekend's box office winner, the remake of 'A Nightmare on Elm Street,' fell sharply (72 percent) in its second outing, scaring up another $9.2 million for a second place finish. At No. 3, 'How to Train Your Dragon' remained the top choice in family viewing, earning $6.8 million and cracking the $200 million mark in its still-strong seventh week.

In its fifth week, 'Date Night' remained the favorite romantic comedy, finishing fourth with $5.3 million. Its rival 'The Back-Up Plan' came in fifth with $4.3 million

The week's other nationwide release, the adorable 'Babies,' took in an estimated $1.6 million on 534 screens, a pretty good opening for a documentary, and just enough to crack this week's top 10. Per screen, it earned an average $2,949, better than any movie this weekend except 'Iron Man 2.'

The full top 10:

1. 'Iron Man 2,' $133.6 million (4,380 screens), new release
2. 'A Nightmare on Elm Street,' $9.2 million (3,332), $48.5 million total
3. 'How to Train Your Dragon,' $6.8 million (3,003), $201.1 million
4. 'Date Night,' $5.3 million (2,734), $80.9 million
5. 'The Back-Up Plan,' $4.3 million (3,003), $29.4 million
6. 'Furry Vengeance,' $4.0 million (3,002), $11.6 million
7. 'Clash of the Titans,' $2.3 million (2,157), $157.8 million
8. 'Death at a Funeral,' $2.1 million (1,706), $38.3 million
9. 'The Losers,' $1.8 million (2,450), $21.5 million
10. 'Babies,' $1.6 million (534), new release

• Follow Gary Susman on Twitter @garysusman.