Marvel have released an epic new trailer for Iron Man 3, due in cinemas on April 25th.
Battle for the Avengers Tower 360°
The Avengers battle Ultron's minions in this 360 degree video (available on Android phones or Google Chrome).
Avengers: Age of Ultron - Opening Battle Featurette
The opening battle of Avengers: Age of Ultron is discussed in this featurette for the film.