Driving through Rockville today, I felt a strange urge to detour through the parking lot where Three Brothers used to be - I hadn't noticed that this location had closed - and in its place was a dusty construction site and signage for "Pizza CS - napoletana, come sempre".
Judging from the Google results, it looks like owners Ankur Rajpara and Jonathan Allen may have originally intended to open in Baltimore's Canton area before settling down in Rockville.
There's the stalled rough beginnings of a website nowhere near ready for public viewing, PizzaCS.com, but the most up-to-date info comes from their Facebook page, which shows the delivery of their Stefano Ferrara oven in July and predicts an October opening date.