Kendrick Lamar just tweeted a link directing people to the following page on iTunes: 

While still untitled (or maybe it's actually called [Untitled]?), we can at least confidently expect that the new album will be released March 23. Pre-order is available now, and it looks like we'll get some sort of digital booklet to go with the release as well.

The iTunes page seems to be unavailable as of now, but keep checking this link to see if it'll be back anytime soon. 

UPDATE: We now have a blank tracklist... 16 songs, people, including the previously released "The Blacker the Berry." Sixteen!