Transformers doesn't come out till June 23rd and Despicable me the week after and then Spider-Man and after that War of the Planet of the Apes. All 4 are almost guaranteed to be box offices success and the only competition Diana really has this week is Cars. Internationally though The mummy did really well despite the Reviews and t looks like for the Children and family demographic Cars looks to do pretty well.
Only time will tell how this all plays out.