Although they are made under the guidance of Google, two Nexus 7 are created by ASUS in Taiwan, which has already shown its good do with the first model, and all indications are that the latter is better in every way.
The rumors that they come from ASUS supply chain in Taiwan, is that it might not make the seven-inch, Lenovo, LG or Samsung Nexus model com possible alternative developers. For Google, it is very important to keep alive the relationship with various manufacturers, and not opting for a unique name.
Although Samsung and ASUS are Palm, others like LG, HTC and Motorola, have made reference devices for Google. Extend the relationship with LG seems positive, after the good reception of Nexus 4, but perhaps more interesting would be to include an emerging actor as Lenovo.
I also consider that the possibility it would be even better for the Chinese to Google, they are very strong in countries such as China or India, but pretty unknown around the world (though the fourth manufacturer). Their projection is the be large around the world, such as ZTE and Huawei.
Like more than any other, but there is little doubt that there will be a new Nexus 7 year coming, that Google continue references to other are taken to do things and how much it should cost.