I think there is much more going on than meets the eye. Google is hard at work developing Fucshia which will one day replace both Android and Chrome OS. They have also started to somewhat distance themselves from Android which has been both a boon and bane for Google. Android has helped make Google a powerhouse in the industry but it's also been the source of endless legal problems. Fucshia will deliver them from that.
Once Android is 'deprecated' by Google It will no longer fit into Google's plans moving forward but it could figure prominently in Microsoft's. I would not be surprised if an acquisition of Android by Microsoft takes place once Fucshia is in place. A Microsoft branded Android would not face the same problems Google has concerning Android. They own many of the patents that have been the source of so many issues and would have an easier time coming to terms with ones they don't.
Microsoft is looking for a way back into the mobile market and Android would certainly give them one. A big one. Google will replace Android and Chrome OS with Fucshia and it will happen virtually overnight and most customers won't even notice. There will also be those that are loyal to Android and won't accept a substitute.
I think a Microsoft branded Android is a real possibility and it looks like Microsoft and Google are setting the stage. Microsoft is doing some heavy development work to integrate their services into Android. Windows Phone was awesome but suffered from a lack of third-party development for the platform. An acquisition of Android would also solve that problem.
The reality is we will only know if it happens. In the meantime, we can only speculate and this is my prediction. It may be a bit out there but it feels right somehow, so don't be too surprised if it one day comes to pass.