This quote is stating that to have any hope for America, a revolution needs to occur and the only hope for a revolution to occur in America is to get somebody like Elvis Presley to become like Che Guevara. The implication is that America needs somebody to stir up a revolution with the same kind of passion and charisma that Elvis and Che had. Elvis Presley was an iconic rock and roll singer, known for having a revolutionary spirit, while Che Guevara was a Marxist guerrilla leader who fought for revolution in Latin America. This quote suggests that if someone like Elvis Presley or Che Guevara were to emerge in America and encourage a revolution, then it would have a strong chance of succeeding.