Yes, I honestly think they will block watch faces.
I think Apple, the freaks of control these days, will never allow you to have any face you want.
Not unless someone is able to hack the watch and open it up to unofficial apps.
At best I think devs will be able to design faces, Apple will view them, reject ANYTHING they don't like, and only allow thru a select amount.
You won't be seeing anything that had not been Censored by Apple on the watch you own, unlike on Android wear.
Not that I like Android Wear.
It's just that, for me, this is a major deal.
I know you enjoy only what Apple allows you to have, but I want to have what I want, irrespective of what they say.
And honestly........... I hope you can turn around in a few months time and prove me wrong.