Well, that was fast rumor turnaround. The white Xbox Ones have been confirmed by Polygon. The Madden 15 bundle will be priced at $399 without a Kinect in the box and is planned to launch August 26.
Actually, it won't have Madden in the box either, since the game will be delivered via a download code. It will also include "three Pro Packs for Madden Ultimate Team." $399 is the standard price of an Xbox One without Kinect.
The Sunset Overdrive bundle isn't priced or dated, but the game is scheduled to launch October 28.