Marvel planned to debut the Avengers: Age of Ultron trailer during Agents of SHIELD next Tuesday, but apparently that plan didn't work out. Shortly after a poor quality version of the entire trailer leaked online, Marvel decided to publish an official teaser trailer on YouTube. The two-minute video shows the full team in action and includes a look at the Hulkbuster armor, a super strange version of "I've Got No Strings," and, of course, Ultron, as voiced by James Spader in what sounds like a wonderfully creepy performance. The film is headed into theaters on May 1st, 2015 in the US.
Update, 7:40 PM ET: Well, we knew this was coming — the trailer has been removed from its original source.
Marvel had this to say:
Dammit, Hydra.
— Marvel Entertainment (@Marvel) October 22, 2014 Update, 9:40 PM ET: Marvel has released an official version of the Avengers: Age of Ultron teaser trailer (above) and poster (below).
Love the @Avengers: #AgeofUltron teaser trailer? Check out the official teaser poster! pic.twitter.com/8KDjlZxnfv
— Marvel Entertainment (@Marvel) October 23, 2014 
:format(webp)/cdn.vox-cdn.com/uploads/chorus_asset/file/23925998/acastro_STK054_03.jpg)
:format(webp)/cdn.vox-cdn.com/uploads/chorus_asset/file/19336098/cwelch_191031_3763_0002.jpg)
:format(webp)/cdn.vox-cdn.com/uploads/chorus_asset/file/25289972/vudu.jpg)
:format(webp)/cdn.vox-cdn.com/uploads/chorus_asset/file/25289727/107711533.jpg)