Not sure if it's official but seemed interesting:
Storyline:
“As the US Government create a force, known as Ultron, The Avengers are told they are not needed any longer. But when Ultron turns against Humanity, it’s time for The Avengers to assemble yet again for their most dangerous challenge ever.”
It features an ensemble cast including Robert Downey, Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Samuel L. Jackson and James Spader.
Avengers: Age Of Ultron is scheduled for release on May 1, 2015.
Source: https://www.latestnewsexplorer.com/avengers-age-ultron-teaser/
Storyline:
“As the US Government create a force, known as Ultron, The Avengers are told they are not needed any longer. But when Ultron turns against Humanity, it’s time for The Avengers to assemble yet again for their most dangerous challenge ever.”
It features an ensemble cast including Robert Downey, Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Samuel L. Jackson and James Spader.
Avengers: Age Of Ultron is scheduled for release on May 1, 2015.
Source: https://www.latestnewsexplorer.com/avengers-age-ultron-teaser/