Since launch, Windows Phone has always had the games under the Xbox Live banner. So why release one of their own Xbox Live titles on Android?
The smart thing to do would be to build up an Xbox ecosystem over a number of mobile platforms which includes Windows Phone. Microsoft’s work with Unity to help the cross-platform development tool is probably the biggest signpost. By growing Xbox as a whole, but working with a middleware engine that allows fast cross-porting between Windows Phone, iOS, and Android, Microsoft can increase the reach of the gaming brand, and at the same time enhance the software catalogue on Windows Phone with the marquee names being released across the three ecosystems at the same time
More thoughts over on All About Windows Phone.