Retail giant Amazon has let the cat out of the bag by listing a suggested release date for Blizzard's next big title, Diablo 3, on their website. 17th of April 2012.
Blizzard has previously stated that they are aiming for a second quarter 2012 release for Diablo 3 and the developers were forced to reassure fans that the game is in a "great shape", after a community manager had indicated otherwise.
Amazon has listed the release down as the 17th of Apri, 2012, but retailers do place release dates for game before they are released as a means of place holder, so we shouldn't get our hopes up just yet. It does seem to go in-line with Blizzard's estimates though.