The new Lego Architecture set, the United Nations Headquarters (21018), has just been released and with it comes details about whats next. According to a Lego survey, the Marina Bay Sands (21021) is coming soon. The Marina Bay Sands is a massive casino located in Singapore. It features an extremely unique design, with a full shopping mall and massive outdoor rooftop pool. It kind of looks like someone took a cruise ship and placed it on top of three skyscrapers. Hah.
Thanks to Brickset for revealing the early details.