Retailer Amazon has outed the release date for Splinter Cell: Blacklist as March 29, 2013.
There's also some details of a Limited Edition, which will come in a steelbook case and will include a map of the conflict zone, and the following digital content:
Exclusive Upper Echelon operational suit (5 armour pieces, with a unique visual and damage protection bonus), Upper Echelon goggles (that shine gold), and a bonus mission, that will presumably involve sneaking around and shooting hapless guards in the back of the head.