Box Office Predictions: The Mummy 3

This is gonna be a close one as Universal's The Mummy 3 debuts against The Dark Knight's third week. Kevin Costner's Swing Vote also comes out this week, but buzz on it has been pretty mellow. Who do you think will be on top?

My predictions:
The Mummy 3: $41 million
The Dark Knight: $38 million
Step Brothers: $16 million
Mamma Mia: $11 million
Swing Vote: $9 million