More info for autocomplete choices?
An easier solution is to modify the 'label callback' property of the node entity.

function mymodule_entity_info_alter(&amp;$entity_info) {
    $entity_info['node']['label callback'] = '_mymodule_label_callback_set';
}

function _mymodule_label_callback_set($entity, $entity_type){
    if($entity_type == 'node' &amp;&amp; $entity-&gt;type == 'my_node_type'){
        //Compute new label here
       $label = 'test';
       return $label;
    }
}