Link image to another view mode with Media 2 and File Entity
I'm not sure what you're asking. Normally you say "show title" and check "link this to content". Same thing here, Make your File view_mode whatever you want and link it to your content url. You may be asking for a Lightbox approach to showing a set of images.

If there's no option to "link to content" for this field, simply create a rewrite url in the Views Field settings to generate a link using tokens.

Now you may ask -- this isnt addressing the teaser -> full view_mode switch for the Entity (or Field?). Creating links in Views, or with the l() function has nothing todo with View Modes ... they're just links you're making.

I find it helpful to add additional view modes to entities, I have used Entity View Modes for that.

You either setup a custom URL to your content that forces the view mode, using for instance View Mode Page or you could try to set a context or something and hand code something that forces the view mode on your destination url yourself using a custom module, for a small example:

/**
 * Implementation of hook_entity_view_mode_alter().
 * Change the view mode of an entity that is being displayed.
 */
function MYMODULE_entity_view_mode_alter(&amp;$view_mode, $context) {
  if ($context['entity_type'] == 'node' &amp;&amp; $context['entity']-&gt;type == 'slang_word') {
    $view_mode = 'slang_dict_word';
  }
}


You could use a custom view mode to only show the Field in question -- with the custom view_mode set.

... maybe this rambling will help you or someone else :)