Thanks to some internet sleuths, the first clue that is pixelized on the 2K Facebook page, was found in it’s entirety. It features the following clues: 2 griffins, a tarantula, and a bed of roses . Thus, leading fans to believe that Blake Griffin, Kevin Durant, and Derrick Rose will in some way be featured on the final cover. Rose is also featured in the 2K13 promo commercial which can be seen here.
UPDATE: The cover has been revealed, see it HERE.