So far, seven worlds have been confirmed for New Super Mario Bros. U. While the Acorn Plains, Sparkling Waters, Frosted Glacier, and Layer Cake Desert have been mentioned by name, there are a three more worlds that have been confirmed by not named. Of these worlds, one is based on the Forest of Illusion from Super Mario World, another is based on Sky World from Super Mario Bros. 3, and the last is a world that takes place inside a tornado.
Unlike other New Super Mario Bros. games, New Super Mario Bros. U will have a large overworld map like Super Mario World, with branching paths that encourage exploration rather than a linear path through the game.
