Up until Monday, Xbox Vice President Don Mattrick seemed like a shoe-in to take over the brand new hardware-focused division that was going to replace the current Entertainment and Devices division in an upcoming Microsoft reorganization. But with Mattrick's sudden departure from the company to become the new CEO at Zynga, Microsoft has been left scrambling to find someone else to fill that important role.

Today, Bloomberg reports that the company is looking at current Head of Windows Product Development Julie Larson-Green to lead that division, which will oversee the Xbox line as well as Microsoft's surface tablets and other hardware. The business news site cited an anonymous person "familiar with the matter" for the insider information, but it notes that the decision isn't yet final and could still change before the reorganization is officially announced, possibly next week.

Larson-Green has been with Microsoft for nearly two decades and joined the Office division in 1997, leading UI design for the product through 2007. She then moved to head up the "Windows experience" group in the company, where she oversaw the rollout of Windows 7 and 8.

The reorganization comes as Microsoft tries to reposition itself as what CEO Steve Ballmer called a "devices and services company" in an October shareholder letter. Bloomberg also reports that the reorg will shuffle up executives in divisions ranging from Skype and Bing to cloud computing and server sales.