Latest product (withouth views)

latest_product.php

<?php 
/**
 * Implements hook_block_info().
 */
function the_aim_custom_block_info() {
  $blocks['latest_product'] = array(
      'info' => t('Latest product'),
  );
  return $blocks;
}
/**
 * Implements hook_block_view().
 */
function the_aim_custom_block_view($delta = '') {
  $block = array();

  switch ($delta) {
    //latest product
    case 'latest_product':
      $block['subject'] = t('Latest product');
      $block['content'] = _latest_product();
      break;
    }
  return $block;
}

/* shop overview simple content */
function _latest_product() {
  global $language;

  $query = db_select('node', 'n');
  $node_results = $query->condition('language', $language->language, '=')
          ->condition('type', 'product_display', '=')
          ->fields('n', array('nid'))
          ->orderBy('created', 'desc')
          ->range(0, 1)
          ->execute()
          ->fetchField();

  if ($node_results) {

        $nodes = node_load($node_results);

        $node_view = node_view($nodes, 'home');

        return array(
          '#theme' => 'latest_product',
          '#nodes' => $node_view,
        );
        ;
    }

    return NULL;
}

function the_aim_custom_theme() {
  return array(
      'latest_product' => array(
          'variables' => array(
              'nodes' => NULL
          ),
          'template' => 'latest-product'
      ),
  );
}