WWE Night of Champions was the second yearly Night of Champions professional wrestling pay-per-view event produced by World Wrestling Entertainment ( WWE ) . Night of Champions ( 2008 ) was a professional wrestling pay-per-view ( PPV ) event produced by World Wrestling Entertainment ( WWE ) , which took place on June 29 , 2008 at the American Airlines Center in Dallas , Texas . It was the second annual event under the Night of Champions name and the eighth annual event under the Vengeance\/Night of Champions chronology .