The new design is shown briefly in the latest EA trailer for Most Wanted. It's unclear how Kinect will play a role but Burnout Paradise used webcams for taking player photos for their licenses.
Criterion's work on Most Wanted is dubbed the spiritual successor to Burnout Paradise as it adopts a sandbox to drive and race around in. It's unlikely Kinect can 'drive'.
Need for Speed: Most Wanted releases on Xbox 360, PS3 and PC October 30th in the US, November 2nd in EU.