It'll be easy for them to ship UnGoogled Android because that's what Huawei (and other manufacturers) use on their phones in China. Demand, however, is another story...

This will find appeal among those that wish to minimise their interaction with Google.

Having a smartphone (access internet, email etc) with camera is appealing, contributing to large surveillance corporations like Google, Facebook etc is not.

This will be a tiny minority of potential users.

if they give me something like F-droid or their own market place which endorses FOSS in a better way than what Android originally promised, e.g. minus the Google / Spyware shit preinstalled, then I'd pre-order one now. There is a window of opportunity and massive momentum for this provided they play their cards right (wouldn't hold my breath ... though ZTE on the other hand has been doing not too bad in contributing and supporting FOSS in the past).

You don't get that many updates on most Android phones anyway.

The last two chinese android phones I have had came with a chinese app store pre-installed anyway. Now, I didn't trust it enough to use it then, but with how google have been the last couple of years...