This is what we have know about NBA 2K17:
NBA 2K17 is a basketball simulation video game developed by Visual Concepts and published by 2K Sports., scheduled to be released on 27 September 2016 in North America and 29 September 2016 for the rest of the world. It is the 18th installment in the NBA 2K franchise and the successor to NBA 2K16. It was released on September 16, 2016 for players who pre-ordered the game, and will be released worldwide on September 20, 2016 for Microsoft Windows, PlayStation 4, PlayStation 3, Xbox One, and Xbox 360. Paul George is the cover athlete for the regular edition of the game, while Kobe Bryant is the cover athlete for the ‘Legend Edition’. In Italy, the cover athlete is Danilo Gallinari, and in Spain, the cover athlete is Pau Gasol.
And, this is what we see about nba 2k17 now from wikipedia: