They come out every season to match the calendar of the NBA regular season (well, they try to).
Check out this link here for products for 13-14
http://www.dacardworld.com/sports-cards/2013-14-basketball-cards You will see releases which are coming out shortly as well.
You could probably purchase some 12-13 boxes or 11-12 boxes on the cheap as they are now less desirable (avoid 11-12 due to lack of rookie cards).
12-13 cards can be found here, boxes:
http://www.dacardworld.com/sports-cards/2012-13-basketball-cards
Crusade, Elite, Innovation, Past and Present should give you a bit of fun, a few autos and game used and won't bust the bank balance.
I would avoid hoops for now in 13-14, they will come down in price over time. Best to get some mid-end products from last year which have dropped in price with some nice RC's.
That, or just buy the cards you want here on OzCT! Boxes are boom or bust!