Omar Gonzalez and Matt Besler have pretty much locked up the center back spots. They'll play tonight, as both are in MLS (LA Galaxy and Sporting KC, respectively). Graham Zusi, also from KC, is almost certainly going to start at right midfield, at least assuming they keep the same formation. The way Aron Johannson's been playing would make me want to consider starting him alongside Altidore, which could potentially push Zusi out, but Klinnsman doesn't seem to be thinking that way.
Zusi should be interesting to watch tonight in the kind of treatment he gets from the Mexican team. His equalizing goal in the 90+ minute of the final qualifying match, while meaningless to the US, singlehandedly prevented Mexico from missing the World Cup. He was already given a bottle of tequila by a Mexican media member in the leadup to this game as a thank you gift.