The past hour or so Ronnie2K has been tweeting to a bunch of celebrities saying
Have a fun opportunity for you pertaining to the NBA 2K franchise. Follow and direct message me back ASAP if interested.
Celebrities, who we care about immensely, he's contacted include David Spade, ?uestlove (who was playable in previous 2K Blacktop games), Arne Duncan (current US Secretary of Education who balls it up), lil Jon, Spike Lee, Puff/P Diddy, Flea from RHCP, and even Eliza Dushku and Khloe Kardashian.
In NFL 2k5, with "The Crib" you could get phone calls from celebrities in the game, so its only a matter of time to find out where this is headed. Hopefully it is only marketing/ad related, not gameplay.