City completed/expansion

I recently completed all streets in Littleton, Colorado (then added the Hard Mode to it, so I’ll need to run two more streets’ nodes now to be 100%).

Anyway, I have received the congrats and the completed city count for it, but I noticed that Littleton is expanding. There are a few neighborhoods and roads that are currently under construction, and they will eventually open to add new streets to run.

So my question is, would my city completion be cancelled once these streets are open? Is there any additional recognition for those who once completed a city but somehow lost it due to expansion?

Your percentage will drop accordingly, based on the updated stats.
If you complete every street in a city, you get a badge and a :100: in your card on that city page. That :100: doesn’t go away as new streets are added.