By Daniel Kline The cruise line wants to rival Royal Caribbean’s Wonder of the Seas and the upcoming Icon of the Seas. Cruise ships have become something between floating megaresorts and small cities. Royal Caribbean’s (RCL) – Get Royal Caribbean Group Report signature Oasis-class ships, for example, feature multiple neighborhoods, including a boardwalk with a carousel, and Central Park, a literal park that takes over a section of the ship. So when it comes to cruise-ship design, raising the bar has become a challenge, due to what Royal Caribbean has accomplished. Its latest Oasis-class ship, …