One important thing that's not at all clear from the article: this is not a campus for Google employees a la Googleplex, but a capital-C Campus run by Google for Entrepreneurs, meaning basically a coworking space/startup incubator that happens to be run by Google. So even if it's built, the people working there won't be Googlers, but random startup people in Berlin.

https://www.googleforentrepreneurs.com/campuses/