Patrick Carney, the drummer of the Black Keys was asked about Blakroc 2 in this interview with an Atlanta radio station. According to this video, the Keys worked on 8 Blakroc 2 songs in October of 2009, and a trailer was made then.. But there are no current plans to release those 8 songs, and why the trailer was leaked is uncertain. This video was spotted at the Black Keys Fan Lounge,. Click the previous link for more info.
Keys fans can be stoked though, because a new Black Keys record is coming soon, maybe in early 2012 and it is said to be an end to end burner.