$the_query = new WP_Query( $args );
if ( $the_query->have_posts() ) {
    while ( $the_query->have_posts() ) {
        $the_query->the_post();
        STUFF
        }
    wp_reset_postdata();
    }

if ($the_query->current_post == 0) {
  // retrieve featured image, title and content }
else {
  // retrieve title only }