Ok.. boh, ho provato a mettere su qualcosa, vedi se può andare bene.
codice:
<!DOCTYPE HTML>
<html>
  <head>
    <title>Esempio</title>
    <meta charset="utf-8">
    <style type="text/css">
      .container {
        position:relative;
        width: 200px;
        height: 150px;
      }
      .container>* {
        position: absolute;
        top: 0;
        right: 0;
        left: 0;
        bottom: 0;
      }
      .container>div {
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        background: rgba(0,0,0,.3);
        color: #fff;
        font: bold 1rem/1 sans-serif;
      }
      .container>.image1 {
        -webkit-transition: opacity 1.1s ease;
        transition: opacity 1.1s ease;
      }
      .container:hover>.image1 {
        opacity: 0;
      }      
    </style>
  </head>
  <body>
    <div class="container">
      <img class="image2" src="http://images.freeimages.com/images/thumbs/a1b/poppy-2-1396348.jpg" alt="">
      <div><p>Lorem ipsum dolor sit amet, consectetur adipisicing elit</p></div>
      <img class="image1" src="http://images.freeimages.com/images/thumbs/be8/poppy-1406311.jpg" alt="">
    </div>
  </body>
</html>