Royal Caribbean has trademarked the name Metropolis of the Seas, which could possibly be used as a name of a future cruise ship.
The cruise line registered the trademark with the United States Patent and Trademark Office on October 1, 2018.
Royal Caribbean trademarked three other possible cruise ship names in September. In addition, Apex of the Seas was registered in 2017 and is still a live trademark.
Royal Caribbean currently has four unnamed ships on order, in addition to Spectrum of the Seas.