Pew. Pew. Pew Pew. Pew.John Favreau has rebounded since his man-crush, Robert Downey Jr., was forced to drop out of Cowboys & Aliens. His solution, of course, was to bring in his vice man-crush. Sam Rockwell will join the already cast Daniel Craig, Olivia Wilde, and Harrison Ford as Doc, a bar owner who joins the fight against the alien threat.The role was originally tailored for a heavyset man but when Vince Vaughn became unavailable, it was rewritten for Rockwell. (THR)