<?php $homepages = get_pages( array(
    'post_type' => 'page',
    'post_status' => 'publish',
    'meta_key' => '_wp_page_template',
    'meta_value' => 'homepage.php'
  ));
  shuffle($homepages);
  foreach( $homepages as $page ) {
  $content = $page->post_content;
  if ( ! $content ) // Check for empty page
    continue;
  $content = apply_filters( 'the_content', $content );
  echo $content;
}
?>