NBA 2K13 Release Date: October 2, 2012
Take-Two didn't detail any features of NBA 2K13, instead focusing on the accomplishments of this year's NBA 2K12, which delivered the top ranked and top selling basketball video game for the 11th year in a row. Despite the challenges of the NBA lockout, NBA 2K12 sold over five million units, for the second year in a row.
Looking forward, it's not hard to see that 2K will attempt to build upon the success of NBA 2K12 which was the first in the basketball series to offer downloadable add-on content and a mobile version for iOS. I fully expect them to focus on DLC and online play heading into NBA 2K13. Expect to see even more emphasis on NBA Legends because, well, we can't get enough Michael Jordan.
Source: http://www.gamezone.com/products/nba-2k12/news/nba-2k13-slated-for-oct-2-2012-release