inFamous: Second Son was given a concrete release date at last night's PS4 All Access event: March 21st, 2014. The new date represents a delay from the original February launch window.
In addition to the release date announcement, developer Sucker Punch also debuted a new trailer for the game, showing off protagonist Delsin Rowe's ability to absorb and use neon.
Finally, images of an inFamous: Second Son PS4 bundle have leaked. Co-founder and producer of Sucker Punch, Brian Fleming, confirmed its existence in a tweet.