Google's Nexus phones to date have been created through partnerships, where the hardware manufacturer lets its talents shine. The Nexus 6P may be Android's ultimate reference device, but there's no mistaking that Huawei made it. However, that relationship might be changing soon. Sources for The Information claim that Google is pushing for more control over Nexus phones, to the point where it would effectively reduce partners to contractors. The folks in Mountain View would design the hardware and software -- vendors would just make sure that those devices become reality. Think of products like the Pixel C if you need an example of where this might go.