Ultron returns to cause even more trouble for our heroes in another trailer for Marvel's "Avengers: Age of Ultron," in theaters May 1! ► Subscribe to Marvel: bit.ly/WeO3YJ Follow Marvel on Twitter: twitter.com/marvel Like Marvel on FaceBook: www.facebook.com/Marvel For even more news, stay tuned to: Tumblr: marvelentertainment.tumblr.com/ Instagram: instagram.com/marvel Google+: plus.google.com/+marvel/ Pintrest: pinterest.com/marvelofficial/