'Iron Man 2' once again proved its metal -- er, mettle -- at the box office, easily overpowering the debuting 'Robin Hood.' The Marvel superhero saga, which enjoyed the fifth best opening weekend ever last week, slid 59 percent this week for an estimated take of $53 million and a total to date of more than $212 million.

The Russell Crowe-Ridley Scott reboot of the Sherwood Forest legend took in an estimated $37.1 million, about what was expected, given its mixed reviews, an older-skewing cast and plot, and a theater count more than 800 below that of 'Iron Man 2.' Opening while 'Iron Man' was still strong and fresh seems like a poor strategic move by Universal, especially since 'Robin Hood' is likely to get squashed next week as well when DreamWorks' 'Shrek Forever After' debuts. 'Iron Man 2' once again proved its metal -- er, mettle -- at the box office, easily overpowering the debuting 'Robin Hood.' The Marvel superhero saga, which enjoyed the fifth best opening weekend ever last week, slid 59 percent this week for an estimated take of $53 million and a total to date of more than $212 million.

The Russell Crowe-Ridley Scott reboot of the Sherwood Forest legend took in an estimated $37.1 million, about what was expected, given its mixed reviews, an older-skewing cast and plot, and a theater count more than 800 below that of 'Iron Man 2.' Opening while 'Iron Man' was still strong and fresh seems like a poor strategic move by Universal, especially since 'Robin Hood' is likely to get squashed next week as well when DreamWorks' 'Shrek Forever After' debuts.

Opening in third place was Summit's romance/travelogue 'Letters to Juliet,' with an estimated $13.8 million. It would have been evenly matched with fellow romance newbie 'Just Wright' -- 'Juliet's' per-screen average was $4,633, nearly identical to 'Wright's' $4,642 -- but 'Wright' was playing in 1,100 fewer venues. The Fox Searchlight love-and-basketball comedy debuted in fourth place with an estimated $8.5 million.

Finishing fifth was DreamWorks' still-mighty family feature 'How to Train Your Dragon.' In its eight weekend, it slipped just 23 percent from last week, earning another $5.1 million for a total so far of $207.8 million.

The full top 10:

1. 'Iron Man 2,' $53.0 million (4,390 screens), $212.2 million total
2. 'Robin Hood,' $37.1 million (3,503), new release
3. 'Letters to Juliet,' $13.8 million (2,968), new release
4. 'Just Wright,' $8.5 million (1,831), new release
5. 'How to Train Your Dragon,' $5.1 million (2,620), $207.8 million
6. 'A Nightmare on Elm Street,' $4.7 million (3,075), $56.1 million
7. 'Date Night,' $4.0 million (2,481), $86.7 million
8. 'The Back-Up Plan,' $2.5 million (2,497), $34.2 million
9. 'Furry Vengeance,' $2.3 million (2,695), $15.1 million
10. 'Clash of the Titans,' $1.3 million (1,300), $160.2 million

• Follow Gary Susman on Twitter @garysusman.