Surprise! After two financially bruising weekends, things are looking up for the American box office. With estimates for Friday’s top five coming in higher than expected, it looks like this weekend should easily top 2010 levels. But that’s not the surprise. The surprise is which film is leading the charge. Relativity Media’s Immortals was Friday’s breakout hit - taking in an estimated $15 million from 3,438 locations. That puts the 3D action title on track to earn $35 million by Sunday, a figure that significantly beats the film’s most optimistic early projections. In fact, a few days ago the smart money was on a third place finish for Immortals behind Adam Sandler’s Jack and Jill and two-time champ Puss in Boots. Instead, Jack and Jill is tracking well below Sandler’s recent comps, taking in $9.8 million on Friday for what should be a $24 million weekend. And, after its limited release on Wednesday, director Clint Eastwood’s J. Edgar took in an estimated $4.2 million from its expanded run in 1,901 locations.  Details tomorrow.