/**
 *  Implementation of hook_views_plugins
 */
function views_json_views_plugins() {
  return array(
    'style' => array(
      'views_json' => array(
        'title' => t('JSON data document'),
        'theme' => 'views_json',
        'help' => t('Renders nodes in the JSON data format.'),
        'handler' => 'views_json_plugin_style',
        'uses row plugin' => TRUE,
        'uses fields' => TRUE,
        'uses options' => TRUE,
        'type' => 'normal',       
      ),
    ),
  );
}

class views_json_plugin_style extends views_plugin_style {
  /**
   * Set default options
   */
  function options(&$options) {
    $options['format'] = 'Exhibit';
  }

  /**
   * Render the given style.
   */
  function options_form(&$form, &$form_state) {
    $form['format'] = array(
      '#type' => 'radios',
      '#title' => t('JSON data format'),
      '#options' => array('Exhibit' => t('MIT Simile/Exhibit'), 'Canonical' => t('Canonical'), 'JSONP' => t('JSONP')),
      '#default_value' => $this->options['format'],
    );
  }
}

function template_preprocess_views_json(&$vars) {
  $view     = &$vars['view'];
  $result   = &$view->result;
  $options  = &$view->style_handler->options;
  $handler  = &$view->style_handler; 
}

//views-json.tpl.php
<?php 
print ('hello views');
?>