World 1: Generic Grassland World 2: Generic desert World 3: Generic water world World 4: Generic Forest World World 5: Generic Ice World World 6: Generic Mountain world World 7: Generic Lava world, with Bowser's castle hidden, and later you see it raise from lava or something like that... generic Bowser Castle.
Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all -Dale Carnegie
She is the assistant for Shigeru Miyamoto, and she told me that Miyamoto has been working on New Super Mario Bros. U for a while, and they have all the worlds written down. The First world is called GrassLand (Like the one with the accorn tree) The Second is called DesertPit The Third is called Starry Forest (The one with the stars) The Fourth is Underground The Fifth is MushroomHeavan The Sixth is DarkForest (The paint level with Boo's) The Seventh is Bomb Field (Close to SM64) The Eighth is Lava Valley The Ninth is Bowser Castle
She also told me that they are thinking about making special worlds like Super Mario 3D Land. She also told me that its not %100 official and final, just like a place holder if you will.
That sounds extremely accurant, because the GrassLand is obvious. Desert Pit, look in the image section. Mario seems to be inside a cave rather than outdoors. A Nintendo rep did say that there would be several levels like the Starry Night levels, I could see there being a Starry Forest, guess that would be the role for a Forest. Underground not sure about that, but okay. Mushroom Heavan, Must explain the second level from the demo at E3 2012, also that would be the role for a Sky World.
Dark Forest very nice suprise. Bomb Field Holy Cow! that would make this game, GOTY for me. Lava Valley, excellent, but expected. Bowser Castle as a world, now thats....thats.....thats O_o mind blowing