[nunez]

Not really. While MS could create their own store and distribute their own distribution of Android based on the Open Source builds, they won’t get access to Play Services which is a big part of the Android experience. MS tried to rectify this by partnering with Cyanogen who had deep experience in customizing Android. That fell through, however. There is also a project that is trying to reverse engineer Play Services itself into an Open Source model, but it isn’t as good and updates take longer.