A Twitter account by the name of djhero has tonight posted these renders, claiming they are the first shots of the upcoming game's turntable controller.
Now, they might be legitimate! The Twitter account is a few months old, and they look nice enough. Then again, there's nothing else to confirm these are being the real thing, so pass judgement on them with a grain of salt or two between your teeth.
UPDATE - These pictures have now been confirmed by Activision by way of a press release. They're the real deal.