AVENGERS: AGE OF ULTRON, Leaks

Its only mid-week and several apparent leaks of licensee and what appears to be style guide images for May's Avengers: Age of Ultron have surfaced. The lastest appearance of these originated on the Prophets of Geektwitter account and features more looks at the Vision, Black Widow, Ultron and an interesting image of how Iron Man fits inside his Hulkbuster armor.

While Marvel Studios has not officially confirmed or commented the authenticity of the images found this week, if they're not genuine, someone is pulling off a fairly elaborate and skillful hoax.
Since it's newly-revealed Ultron can hack into any computers, maybe he's doing the leaking himself?

Source: Newsarama.com and Prophets of Geek