Now that Amazon has partnered with Blackberry I believe the next logical step is to get Samsung on board. Consumers are sick and tired of the monopoly Google has over the Android OS (Google play services) and want a viable alternative, and I believe that alternative could very well be Amazon's forked version of Android. With the market share Samsung has in the android device market if it were to dump the google play store for the Amazon app store I believe the major app devs would follow. Samsung is chaffing at the demands Google places on all the manufacturers that run google play services and is developing Tizen as a response to this not to mention there is the class action lawsuit that Google is facing from consumers.
This is how I envision the partnership would work between all three players. Samsung dumps google play services and the google play store to use Amazon's app store, as well as release native BB10 editions of their phones and tablets, lastly combine that with the Amazon store to sell directly to consumers and you have a good recipe for success.