In the upcoming Avengers: Age of Ultron, The Vision was kept a secret from the public for quite a long time. He's not in the trailers and his poster wasn't revealed until much later. In fact, there hasn't been any video of the character... until now.
Actor Paul Bettany, who plays The Vision, went onto The One show and played a couple of clips from Age of Ultron. The clip you want to see, featuring the waking moments of the Vision, starts at 5:05.
Avengers: Age of Ultron opens up on May 1, 2015.